slacken off

He HAD worked without intermission for six months and now could slacken off for a holiday.

他已不间断地工作了六个月，现在可以休假了。

When will this pain slacken off?

这种疼痛什么时候才会减轻？

The demand for coal begins to slacken off in the spring.

煤的需求在春天开始减少。