重家具给旧地板施加了压力。

The heavy furniture puts a ___strain on the old floorboards.

跑马拉松会给膝盖带来很大压力。

Running marathons can put a lot of ___strain on the knees.

持续的噪音对我集中注意力的能力造成了压力。

The constant noise puts a ___strain on my ability to concentrate.