Quick/slow on the uptake:
If someone is quick/slow on the uptake, they understand things easily/with difficulty.
当我们说某人 “quick on the uptake”，意思是这个人 “很快就能明白或掌握某件事情”。反之，假如说某人 “slow on the uptake”，就表示这个人 “理解某件事情感到很吃力，领悟较慢”。
例句
Sorry, can you explain that again? I am a bit slow on the uptake.
不好意思，你可不可以再解释一遍？我理解起来比较吃力。
Henry’s quick on the uptake, so I didn’t need to repeat the instructions.
亨利的领悟力很强，因此我不用重复指示。
She was quick on the uptake and managed to build the model in less than an hour.
她领悟力很强，不到一小时就把模型建好了。
