Valvetrain
气门
🗣️ 情景例句
What's your name?
你叫什么名字？
Virtue is a jewel of great price.
美德是无价之宝。
Then it turned in a semicircle, ran straight again, and turned in another semicircle to the opposite side.
然后转一个半圈，再沿直线飞，再朝反方向转个半圈。