velocity of rotation的用法和樣例：
例句
- Rotation speed is one of the key reasons which are relative to the quality of friction stir welds and tunnel defect existes at lower rotation speed.
攪拌工具旋轉速度是影響接頭成型形貌的關(guān)鍵原因之一，速度過(guò)低有可能會(huì )導致隧道型孔洞缺陷。 - Hubble helped astronomers determine the masses of several black holes by measuring the velocities of material whirling around them.
哈勃幫助天文學(xué)家確定了若干個(gè)黑洞，通過(guò)測量物質(zhì)的他們周?chē)男D速度。
