hardcore
['hɑ:dˌkoʊr]
n.
核心部分，中坚分子;
adj.
绝对的;
无条件的;
没有限制的;
（黄色作品）赤裸裸描写性行为的;
例句:
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He is also a hardcore gamer and an unabashed geek.
来自BBC
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But hardcore schizophrenics in particular can't be trusted.
但是这些精神分裂的话都不值得相信.
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Image matching is hardcore technology that digital photogrammetry achieve automatic survey.
影像匹配是数字摄影测量实现自动化量测的关键技术.
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Frequency synthesizer is the hardcore of a electronic system.
频率合成器是电子系统的核心部件.
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One reason is a paucity of hardcore expert skiing.
来自THETIMES
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It's hardcore that shouldn't stay underground.
来自BBC