The rope holding the boat suddenly tightened and broke.
系船的绳子突然绷断了。
His mouth tightened into a thin line.
他的嘴抿成了一道细缝。
to tighten a lid/screw/rope/knot
拧紧盖子╱螺钉；绷紧绳子；打紧结
The nuts weren't properly tightened and the wheel came off.
螺母没拧紧，轮子脱落了。
She tightened her grip on his arm.
她抓他的手臂抓得更紧了。
to tighten security
加强安全措施
1.收紧,拉紧,抽紧;绷紧;固定
1.to turn something such as a screw or a cover until it is tight and you cannot turn it any more
2.to pull something such as a rope or a belt until it is straighter or until it fits more tightly around something; if something such as a rope or a chain tightens, it becomes straighter or it fits more tightly around something
3.if your hand tightens, or if your fingers tighten, you hold something more tightly
4.if a muscle or a part of your body tightens, or if you tighten it, it becomes hard and stiff, often because you are angry or afraid; if your mouth tightens, or if your lips tighten, your mouth looks narrow because you are angry or annoyed
5.to make a set of rules stricter or harder to avoid; to make an arrangement for guarding or protecting something more effectively
1.to turn something such as a screw or a cover until it is tight and you cannot turn it any more
2.to pull something such as a rope or a belt until it is straighter or until it fits more tightly around something; if something such as a rope or a chain tightens, it becomes straighter or it fits more tightly around something
3.if your hand tightens, or if your fingers tighten, you hold something more tightly
4.if a muscle or a part of your body tightens, or if you tighten it, it becomes hard and stiff, often because you are angry or afraid; if your mouth tightens, or if your lips tighten, your mouth looks narrow because you are angry or annoyed
5.to make a set of rules stricter or harder to avoid; to make an arrangement for guarding or protecting something more effectively
1.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。
2.You may also choose to tighten up your spending habits simply to get out of debt or to save more for retirement.
为了还清债务或为存更多的退休金，你可能要改变自己的消费习惯，缩紧开支过日子了。
3.It was a few days after the marriage will have to tighten its belt for tough times ahead, some people may even take the risk for the money.
有人婚后不几天便要勒紧裤带过苦日子，有些人甚至会为了钱铤而走险。
4.They left it open-ended' with an indication of a willingness to loosen policy further rather than tighten, he said.
他们留下了调整的空间，暗示了进一步放松而非紧缩政策的意愿。
5.I began to tighten up, my legs spasmed and I knew what was happening.
我开始勒紧在，上面我的腿抽筋，而且我了正在发生的东西。
6.In these days of dieting and weight watching, most people would love to be able to tighten their belt after losing a few kilograms .
从这几天关注节食和体重方面来看，大部分人瘦了几公斤而不得不勒紧他们的腰带。
7.It is now ready to be driven. Each worker along the "assembly line" has a separate job to do. Some add parts and some tighten parts.
生产线上的每一位工人都单独负责一件工作，比如，有人专门往上加部件，有人专门负责将部件拧紧。
8.Meanwhile, Senator Chuck Grassley (R-Iowa) is trying to use a Democratic budget plan to tighten limits on government payments to farms.
另外，参议员查克•格来斯雷（衣阿华州共和党人）正打算采用民主党的预算方案来加强政府对农场付款的限制。
9.The crisis, he said, was like a rope with a knot in the middle: the more each side was pulled, the more the knot would tighten.
他说，危机好比一条中间打上结的绳子，两头越拉，绳结越紧。
10.Without lifting your heel up in the air, tighten your quadriceps muscle as hard as you can for ten seconds.
向上举起你的脚后跟，绷紧你的四头肌肌肉坚持10秒。