Karst
n. 喀斯特(区)
🗣️ 情景例句
I know a great place for-
我知道一个好地方干-
A guilty conscience needs no accuser.
贼胆心虚。
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。