impair
单词辨析：
用于人、动物或环境，也可用于名誉或形象，程度较轻。
The kidnappers didn't harm the little boy.
绑匪没有伤害那个小男孩。
Don't harm your eyes by reading in dim light.
不要在昏暗的灯光下看书，以免损害眼睛。
This machine can handle chemicals that harm the environment.
这台机器能够处理损害环境的化学物品。
His failures harmed his reputation.
他屡次失败使他的声誉受损。
可以用于某物或某人的身体，表示使之失去价值或功能；也可用于感情、信心等，表示产生不良影响。
The early frost damaged the crops.
早霜把庄稼给毁了。
His car was damaged in a collision.
他的汽车被撞坏了。
Smoking can damage your health.
吸烟会损害健康。
More attention should be given to emotionally damaged children.
感情受到伤害的儿童应该得到更多关注。
指身体、感情等受到伤害，侧重于感到疼痛，也可指产生不良影响，程度可轻可重。
He hurt his right leg badly in the football match.
在那场足球赛中，他的右腿受了重伤。
He hurt her feelings.
他伤害了她的感情。
Unfair competition has hurt the company's position in the market.
不公平竞争已经对这家公司的市场地位造成损害。
指使情况变得更糟、价值更小等。
Smoking impaired his health.
吸烟使他的健康变得更糟。
His vision was impaired.
他的视力变差了。
相关例句：
Sleep deprivation can impair motor skills as much as alcohol intoxication can.
缺乏睡眠会损害人的肌肉运动技能，其程度同酒精中毒一样。
Conventional risk assessment reports focus on what risks might impair investors 'confidence in a company.
传统的风险评估报告，关注重点是何种风险可能损害投资者对公司的信心。
Also common are depression and anxiety, which Dr Pierides says can impair capacity to make decisions.
抑郁和焦虑也是常见的问题。皮耶里德斯说，这些问题会损害他们的决策能力。
Alcohol also depletes your body's Vitamin B, and can disrupt sleep and impair judgment and clarity of thought.
酒精也耗尽你的身体的维生素B，可以扰乱睡眠和损害的判断和清晰的思路。
Both impair free choice.
这两者都破坏了自由选择。
Any monopolized activities which impair fair competition can be curbed by such a law.
任何对公平竞争有害的垄断行为都可以通过这样的法律来加以抑制。