He is very quick to catch on to things.
他领悟能力很强。
Wait a minute! I'm beginning to catch on.
等一下！我开始有点懂了。
Eddie slipped the safety catch on his automatic back into place.
埃迪将自动步枪的保险栓重新拉上。
It's hardly surprising his ideas didn't catch on
他的想法没有被广泛接受，这并不足为奇。
At first I didn't catch on, then I suddenly saw the light.
始而不解，继而恍然。