clamp down on illegal activities
... 严厉打击非法活动 clamp down on illegal activities 黑社会的非法活动 illicit activities of triad gangs 任何有关的非法活动 Anything related to illegal activity ...
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clamp down on illegal activities
严厉打击非法活动
以上为机器翻译结果，长、整句建议使用 人工翻译 。