Arrow, shǐ, crossbow also. So are the arrows for crossbows. From the entrance. You want it.

Arrows fired with bows or crossbows are structurally divided into arrows, shafts and feathers. Arrows are divided into thin dagger type, triangle type, cone type and flat head type. The arrow shaft was called a "stick" in ancient times and was usually made of bamboo or wood.

The arrow feather is closely related to the flying speed and accuracy of the arrow. There are too many arrows, and the flight speed is slow. Too little, poor stability. Arrow originated in the Neolithic Age and is one of the oldest weapons.

Extended data:

Leave the arrow to shit. Historical Records Biography of Lian Po and Lin Xiangru: "Although General Lian is old, he is still good at eating and drinking. However, sitting with the minister is worthy of the third inheritance.

Make up your mind [shǐ zhì] and swear: ~ Never change. ~ in science.

Vector [sh ǐ li dang] is also called a vector. A quantity determined by size and direction. As opposed to "scalar". Such as force, speed and other physical quantities. The operation of vectors is different from scalar, for example, the synthesis of vectors follows the parallelogram rule.

Assertion [shǐ kǒu] Assertion: ~ Deny. ~ deny it.

Crazy arrow, powerful arrow. Excellent talents.

References:

Baidu Encyclopedia-Vector