n. 锁;水闸,船闸;(机器部件等的)锁定;一把,一撮;
vt. 锁上;锁好,关好;使固定;隐藏;
vi. 卡住,不动;纠结;僵硬不动;
🗣️ 情景例句
It's getting late.
时间不早了。
Nothing is stolen without hands.
无风不起浪。
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.