Phugoid motion
[化] 起伏运动
🧩 词语组成解析
长週期振动
motion
['məuʃən]
n. 运动;手势;动机，意向;请求;
vt. 打手势;向某人点头或摇头示意;打手势要求[指示];
vi. 运动;打手势;
🗣️ 情景例句
and Mom has all these committees she's on.
妈妈又有那么多的小组会议要开。
In time of peace prepare for war.
居安思危。
First of all, it's been improved. And it's bigger, although it's more expensive.
首先，它已作了改进。而且机子较大，尽管价格贵些。