Variopter
(滑动)光学计算尺
🗣️ 情景例句
He started out on a voyage around the world.
他开始周游世界。
Don't bother him.
不要打扰他。
There aren't enough candles, said ann. There are only twelve. We'll need one more.
“蜡烛不够呀，”安说，“只有12支。我们还需要一支。”