Variopter
(滑动)光学计算尺
🗣️ 情景例句
If you really mean it,
假如你是说真的，
It is up to you to carry out the plan.
由你实行那个计划。
It had been wrapped up in newspaper and it contained half the money he had lost,
钱包是用报纸包着的，里面有他丢失的钱的一半，