“屈膝”常见的英文表达有 kneel(动词,侧重于描述屈膝的动作)和 bend the knees(动词短语,更直白地表达“弯曲膝盖”这一动作) 。例如:
He knelt down to pick up the coin.(他屈膝蹲下捡起了那枚硬币。)
You need to bend your knees a little when doing squats.(做深蹲时,你需要稍微弯曲膝盖。)