长期睡眠不足会导致注意力下降和四肢乏力。Chángqī shuìmián bùzú huì dǎozhì zhùyìlì xiàjiàng hé sìzhī fálì.Long-term lack of sleep can lead to poorer concentration and weakness in the limbs.
感冒以后我浑身乏力,什么都不想做。Gǎnmào yǐhòu wǒ húnshēn fálì, shénme dōu bù xiǎng zuò.After catching a cold I felt weak all over and did not want to do anything.
走了一天的山路,他两条腿都乏力了。Zǒu le yì tiān de shānlù, tā liǎng tiáo tuǐ dōu fálì le.After walking mountain paths all day, both his legs had gone weak.