Sphingidae
天蛾科
🗣️ 情景例句
How much time will it take for my mail to get to where it is going?
我的信件到达它要去的地方要用多少时间？
Who lives by hope will die by hunger.
靠希望而生，必因饥饿而死。
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。