defect
noun [ C ] uk/ˈdiː.fekt/ us/ˈdiː.fekt/
C1 缺点；缺陷；瑕疵
a fault or problem in something or someone that spoils that thing or person or causes it, him, or her not to work correctly
All the company's aircraft have been grounded, after a defect in the engine cooling system was discovered. 自从发现发动机冷却系统有缺陷之后，这家公司所有的飞机都已经停飞了。
There are so many defects in our education system. 我们的教育体制缺陷太多了。
It's a character defect in her that she can't ever admit she's wrong. 她在性格上有缺陷，从来都不承认自己有错误。
生理缺陷;生理障碍
a physical condition in which something is wrong with a part of someone's body
She suffers from a heart/sight/speech defect. 她的心脏／视力有缺陷／她有语言障碍。
The drug has been shown to cause birth defects. 那种药物已被证明可导致新生儿先天性缺陷。
Cystic fibrosis is caused by a genetic defect. 囊性纤维化病是由遗传缺陷引起的。
defect
verb [ I ] uk/dɪˈfekt/ us/dɪˈfekt/
（尤指为加入敌对国家、政党等）脱离，退出，叛逃
to leave a country, political party, etc., especially in order to join an opposing one
When the national hockey team visited the US, half the players defected. 国家曲棍球队访问美国时，有一半队员都叛逃了。
The British spy, Kim Philby, defected to the Soviet Union/defected from Britain in 1963. 英国间谍金‧菲尔比于1963年叛逃到了苏联。