Arithmometer
[计] 四则运算器
🗣️ 情景例句
Thank you.
谢谢。
You must go to the moon. It's your duty.
你必须上月球去，这是你的职责。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.
某些大公司进行的研究属于一般和基础性的研究。因此不保密对他们才有利。