事实上，这只蝴蝶在余生中就只能拖着这肿胀的身体和软弱无力的翅膀爬来爬去了。
In fact, the butterfly spent the rest of its life crawling around with a swollen body and shriveled wings.
老年人之所以经常跌倒是因为他们虚弱到没法保持身体平衡，而软弱无力的肌肉也使得他们上楼梯和开罐头变成了一件难事。
Older people often fall becausethey are too weak to brace themselves, and they have trouble with stepsand opening jars because their muscles have lost so much strength.
他会把种种条件和限制堆砌在一起，尽管这样讲话标志着他的细腻敏锐，但也使他显得优柔寡断、软弱无力。
The piling up of conditions and reservations, though a mark of subtlety, makes him seem vacillating and weak.
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