"tightens" in Chinese (Simplified)
收紧变紧
Definition
通过拉紧或压紧使某物变得更牢固或更紧，也可以指加强规则或限制。
Usage Notes (Chinese (Simplified))
既可用于实物（如“tightens the lid”）也可用于比喻（如“tightens controls”）。正式与口语都常见，根据上下文判断是实际动作还是抽象加强。
Examples
She tightens the lid on the jar to keep it fresh.
她**收紧**罐子的盖子，以保持新鲜。
He tightens his belt before leaving the house.
他出门前**收紧**了皮带。
The manager tightens the rules at work.
经理**收紧**了工作规定。
Every time it gets cold, the metal tightens a little bit.
每次天气变冷，金属都会**收紧**一点。
She always tightens her grip when she’s nervous.
她紧张时总会**收紧**握力。
If the government tightens controls, travel will be harder.
如果政府**收紧**管控，旅行会更难。