Ephemerid
n. 蜉蝣
🗣️ 情景例句
when Susan and Richard were babies?
当Richard和Susan还很小时？
Who is going to throw stones?
谁在扔石头？
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。