hard-core
[hɑː(r)d kɔr]
adj.
硬（果）心的;
特别坚定的;
低级色情的;
n.
核心力量;
铁杆分子;
例句:
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To get beat by your arch rivals is hard.
来自BBC
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Then, the hard part begins - landing safely.
来自BBC
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It is hard to imagine a more likeable heroine.
来自BBC
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A hard-core group of right-wing senators had hoped to sway their colleagues.
一群骨干右翼参议员曾企图左右自己的同僚。
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We've got a hard core of customers that have stood by us.
我们拥有一批一直支持我们的忠实顾客。
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He has a hard core of support among white racists.
他得到了白人种族主义者强有力的支持。