tighten the belt

基本解释

Tensioning device is mounted on the down drum of the bucket elevator to continuously tighten the belt;
张紧装置装在斗提机尾轮上，能连续拉紧斗提皮带；
Push your weight into the child seat as you tighten the seat belt to make sure the child seat is securely held.
儿童座椅推入你的体重，你收紧安全带，以确保儿童座椅安全地举行。
blog.sina.com.cn
The flow conservation law of belt drive is introduced and the conclusion that the tension difference between the tighten belt and the looser leads to speed difference is proved.
介绍了皮带流量守恒定律，根据此定律论证了皮带松紧边拉力差导致速度差这一结论。

And he continues to believe that it is -- in an environment like this, it is incumbent upon everyone to help the country tighten its belt.
WHITEHOUSE: Press Briefing
All of that is contributing to the need for people to tighten their belt.
NPR: Financial Expert Examines Possibility of Recession
In December 1997 the IMF asked South Korea to tighten its belt a notch (a fiscal improvement of 0.4% of GDP).
ECONOMIST: Has the IMF changed? Or has the world?