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stiffen的一般过去时为：stiffened...
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vt.& vi.（使）变硬，（使）强硬，使绷紧，使猛烈，使粘稠...
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stiffen的第三人称单数（三单）为：stiffens...
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stiffen的音标：stiffen的英式发音音标为：['stɪfn]stiffen的美式发音音标为：['stɪfən]...
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The blood supply to the skin is reduced when muscles stiffen.当肌肉变得僵硬时，皮肤的供血量就减少了。I must stiffen Dreamer's back.我一定要给德里麦打气.These clothes restrict your freedom of movement and stiffen up the whole body.这些衣服使你行动不便，让全身都...
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stiffen的现在进行时为：stiffening...
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He tried to stiffen his wavering soldiers.他企图使动摇的士兵坚强起来.These clothes restrict your freedom of movement and stiffen up the whole body.这些衣服使你行动不便，让全身都变得不灵活。I felt my body involuntarily stiffen against her invasion of my p...