: no foreign objects; Pure, undoped

(work, work, etc) reality; Up to standard

means that the quality of skills, work or materials is up to standard.

means that people conform to certain moral norms.

2. the origin of the name of bluetooth

from 94 to 985, Harald Blatand, later known as Harald Bluetooth, unified the whole of Denmark. His name "Blatand" may be taken from two old Danish words. "bla" means dark skin, while "tan" means great man. Like many kings, Harold expanded in four places and fought for politics, economy and honor. In 96, Harold reached the highest point of his power and conquered Denmark and Norway. Bluetooth is the nickname of the Danish king Viking, because he loves to eat Lan Mei and his teeth are dyed blue, so he got this nickname.

SIG(Special Interest Group) is associated with the King Harold in the 1th century, and named its wireless technology "Bluetooth". Today, it is most appropriate to use this seemingly strange name to reflect and set off SIG's ambition to unify the wireless technology field. This concept, which was put forward by Ericsson in 1995, has been accepted by the industry so quickly that the members of Bluetooth Special Interest Group (SIG) can see the importance attached to it. In fact, research has been started before this

3. According to the literature, the earliest person who used the ring was the Greek tragic hero-Prometheus who was bound. In order to punish Prometheus for stealing fire from human beings, Zeus tied him to Mount Kaukassus. Every day, an eagle flew to the mountain and pecked out his internal organs. At night, his lost organs would grow back. Later, Hercules killed the eagle and rescued him. The chain that bound him turned into his ring. Later, the ring represents the meaning of mutual maintenance, so as early as in ancient Rome, wearing a ring became a way for men and women to promise each other.

The circular shape of the wedding ring symbolizes life and eternity. The reason why the wedding ring is worn on the ring finger is because the Egyptians believe that the blood of this finger leads directly to the atrium and can reach the place where love is in charge-the heart. Because the ancient Romans believed that the ring finger was guarded by Apollo, the sun god, wearing a ring on the ring finger, especially a diamond ring with the power of the sun, can strengthen love and make it last forever.

As a token of publicly announcing the marriage contract, the ring in ancient Rome was just a simple iron ring. It was not until the second century that people began to use precious metal gold to make rings. Later, because Christians followed the custom of ancient Rome, the wedding ring became an indispensable token of love in weddings, which continues to this day.

Before the 15th century, only monarchs could wear diamond ornaments, and the wedding rings of wealthy families were set with precious stones. It was not until the 15th century that the diamond became a symbol of faithful marriage that the diamond ring became a part of the wedding ceremony.

regarding the origin of the wedding ring, China said: in ancient times, when the king favored his concubine, he gave her a silver ring as a voucher, and when she gave birth, she changed it into a gold ring. Later, ordinary people also used the ring as a proof of marriage and gradually evolved into a wedding ring.

4. Fruit: the general name for edible fruit with more water.

vegetables: herbs that can be eaten as vegetables.

actually, this classification is not too strict. In my impression, an important sex of fruit should be sweetness. So no one calls sugarcane a vegetable. The most difficult thing to distinguish is tomatoes. Although it is not sweet, it is closer to fruits than vegetables. Water chestnut and lotus seeds are generally eaten as fruits.

Tomatoes, also known as wolf peaches, originated in America, and were later brought back to Queen Elizabeth by British explorers. Since then, it has been planted in Queen Elizabeth's garden. Because tomatoes have an unpleasant smell, no one dares to taste them. It was not until one day that a brave man tasted its delicious food for the first time and was not poisoned. From then on, people found that tomatoes turned out to be a delicious food.

In the past, tomatoes were classified as vegetables because of a short story of American Customs. It turned out that when tomatoes were exported to the United States, the United States Customs thought that tomatoes could be eaten directly as fruits, so they had to pay customs duties. Exporters believe that tomatoes should enter the kitchen and be served on the table after cooking, so they belong to vegetables and should be exempted from customs duties. The two sides do not give in to each other. Finally, it had to be solved by law. Finally, the court decided that tomatoes belonged to vegetables and determined its status in the form of law. Since then, tomatoes have become a delicacy on people's tables.

5. Not from Northeast cuisine, but from Beijing cuisine. . Mushu meat

First of all, Mushu is a misprint of Melilotus, which is sweet-scented osmanthus. Because the color is the same as egg yolk, the egg is called Mushu, and later it is what we call Mushu. Then why don't we call it an egg and call it Mushu? The reason is that eggs are regarded as swearing words among the population in Beijing, so in order to avoid this word, Beijingers call eggs mushu.

secondly, talk about moo Shu meat. As the name implies, it is fried meat with eggs, and Mushu persimmon is fried persimmon with eggs. However, Mushu meat needs to be added with fungus and cucumber as ingredients, so Mushu meat has developed into a mixture of egg, fungus and cucumber meat.

6. Tomatoes are tomatoes, so people in Northeast China are used to calling them persimmons simply.