Underexpansion
(喷管中气体)不完全膨胀, 膨胀不足
🗣️ 情景例句
Here is a copy of all the things we need to start with.
这是我们一开始就需要的所有东西的清单。
It is an equal failing to trust everybody, and to trust nobody.
信任一切与不信任任何人，同样是弱点。
He has made neat paths and has built a wooden bridge over a pool.
他修筑了一条条整洁的小路，并在一个池塘上架了一座小木桥。