免疫力

miǎnyìlì 〔名〕①生物对某种传染病的抵抗力,有先天性免疫力与获得性免疫力两种:接种卡介苗,对结核病就有了～。
②比喻自觉抵制社会生活中的某些不健康因素的能力:不要让青少年看这一类电影,因为他们还没有～。

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• it's all Greek to me
• it's a wonder (that)…
• it says a lot, very little, etc. for somebody/something
• it's a… thing
• it's early days (yet)
• itself
• it serves somebody right (for doing something)
• it's just/only a matter of time (before…)
• (it's) no/little/small wonder (that)…
• it's not as if
• it's not brain surgery
• it's not rocket science
• it's not somebody's day
• it's no use (doing something)
• it's official
• it stands to reason
• it's/that's not my problem
• it takes all sorts (to make a world)
• it takes two to do something
• it/that figures
• itty-bitty
• it will cost you
• it won't do
• it won't/wouldn't hurt (somebody/something) (to do something)
• it wouldn't do somebody any harm (to do something)