very hard to guard against
形容防备不过来。 impossible to defend effectively; very hard to guard against [飞黄腾达] fēi huáng téng dá 比喻一些人的地位提升的很快。
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... very hard lead pencil 非常硬的铅笔 very hard to guard against 防不胜防 very hard water 极硬水 ...
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very hard to guard against
很难防范
以上为机器翻译结果，长、整句建议使用 人工翻译 。