Derivometer
测偏仪
🗣️ 情景例句
In those days, when they made quilts.
那个时代 ，人们做被罩时，
I want to go coach, and I'd prefer a morning flight.
我要普通舱，还有，我喜欢早上的班机。
An electric razor that meets the European Union's safety standards must be approved by American testers before it can be sold in the United States,
一把符合欧洲联盟安全标准的电动剃须刀必须得到美国检测人员的认可，方可在美国市场上销售；