He leant on the chair and began his lecture at leisure.

他靠在椅子上开始从容地进行他的演讲了。

He is always busy and rarely at leisure.

他总是忙碌，很少有空。

I like to read books when I am at leisure.

我有空的时候喜欢读书。

Let's go for a coffee when you are at leisure.

你有空的时候，我们一起去喝咖啡吧。

She likes to take walks when she is at leisure.

她有空的时候喜欢散步。

He likes to be at leisure on weekends, reading books.

他喜欢在周末闲着，看看书。

I have no work today, so I can be at leisure.

我今天没有工作，可以闲着。

If you are at leisure, can you help me with something?

如果你闲着，可以帮我做点事吗？

She is always busy and hardly has time to be at leisure.

她总是很忙，几乎没有时间闲着。

If you are at leisure, please help me check this document.

如果你有空，请帮我看看这个文件。