Mrs Fairfax is a heavy sleeper, like most old people, and didn't hear anything.

费尔法斯太太像大多数老年人一样，睡得很沉，没听见什么。

I'm a pretty heavy sleeper, you know.

我晚上睡的比较沉。

I am not a very heavy sleeper, and the anxiety in my mind tended, no doubt, to make me even less so than usual.

我不是睡得很沉的人，并且担着心事，无疑使我睡得比平时还易惊醒。

Bird flew in Bear's window and  started chirping as loud as she could, but Bear didn't wake up, because even bears  who are easily scared are very heavy sleepers.

小鸟飞进了小熊的窗户， 开始用尽全力鸣叫，但小熊并没有醒来， 因为即使是容易受到惊吓的熊也会睡得很沉。

Each night before going to sleep,   he would tie a bell to his door that would make a noise if  anyone tried to sneak in (because even a bear who is easily  scared is a very heavy sleeper).

每天晚上睡觉前，他都会在门上系一个铃，如果有人试图偷偷溜进去，它就会发出声音（因为即使是容易害怕的熊也会睡得很沉）。