长时间下坡会给膝盖造成额外压力,因此徒步者最好使用登山杖。Cháng shíjiān xiàpō huì gěi xīgài zàochéng éwài yālì, yīncǐ túbùzhě zuìhǎo shǐyòng dēngshānzhàng.Long descents put extra pressure on the knees, so hikers had better use trekking poles.
跳舞跳了一晚上,膝盖疼得厉害。Tiàowǔ tiàole yī wǎnshang, xīgài téng de lìhai.After dancing all evening, my knees hurt badly.
地上很凉,别让孩子的膝盖直接碰地板。Dìshang hěn liáng, bié ràng háizi de xīgài zhíjiē pèng dìbǎn.The floor is cold; do not let the child's knees touch it directly.