Knowing what he is capable of, you have every right to be afraid.
既然你知道他的能力如何,你的担心是完全可以理解的。
One night, the gaoler decided to play a joke on his colleague to find out if, after so many performances, he had managed to learn the contents of the letter by heart.
一天晚上,狱卒决定与他的同事开一个玩笑,看看他反复演出这么多场之后,是否已将信的内容记熟了。