Crossbar: mesh number and denier;

Add a vertical: Tian, A, You, Shen, Lao, Bi, Fan;

Add an apostrophe: white;

Plus a discount: electricity.

Among them, mother, Dan, Tian, You, Shen, A, Jiu, Bai and Dian are commonly used words; Rudder and rudder are uncommon words.

Explanation:

Yóu yuē Lu, also known as "cockroach", was called a cockroach in the ancient book Erya, a sweet lady and a stone ginger worm in the negative materia medica.

Expand:

Stroke refers to a continuous line when writing Chinese characters. It is the smallest constituent unit of Chinese characters, which can be divided into horizontal (1), vertical (2), left (3), dot (3), four (3) and fold (4). , ∞) and so on, the specific subdivision can reach more than 30 kinds.

Chinese character stroke order rule table: