Covalent
a. 共有原子价的, 共价的
🗣️ 情景例句
and my friends don't want to go.
我的朋友们又不想去。
Boys will be boys.
孩子终归是孩子。
To escape from the Earth in a rocket, one must travel at seven miles per second.
要乘坐一枚火箭飞离地球，火箭的速度要达到每秒7英里，