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ADJ
防御（性）的;防卫（用）的;保护的
You use defensive to describe things that are intended to protect someone or something.
例句
The Government hastily organized defensive measures against the raids...
政府急忙布置了防卫措施抵御空袭。
The union leaders were pushed into a more defensive position by the return of a Republican Congress in November.
由于 11 月份共和党重新控制了国会，工会领导人被推到更加被动防守的位置。
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ADJ-GRADED
（表现在行为上）防御的，戒备的，卫护的
Someone who is defensive is behaving in a way that shows they feel unsure or threatened.
例句
Like their children, parents are often defensive about their private lives.
就像子女一样，父母也常常很注重保护他们的私生活。
She heard the blustering, defensive note in his voice and knew that he was ashamed.
她听出他话音里的气势汹汹和自我卫护，知道他感到了羞愧。
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PHRASE
处于防御姿态;处于守势
If someone is on the defensive, they are trying to protect themselves or their interests because they feel unsure or threatened.
例句
Accusations are likely to put the other person on the defensive...
谴责很可能会引发对方自我防卫的反应。
He smiled, not wanting to put the man on the defensive.
他笑了笑，不想让那个人产生抵触情绪。
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ADJ-GRADED
(体育运动中的打法)防守（型）的
In sports, defensive play is play that is intended to prevent your opponent from scoring goals or points against you.
例句
I'd always played a defensive game, waiting for my opponent to make a mistake.
我总是采取防守型的打法，等待对手出错。