The branch bent but didn’t break when the boy climbed along it. 那男孩爬上树枝时, 树枝弯曲了, 但是没有折断。 He bent forward to listen to the child. 他弯下身来听那孩子说话。 Touch your toes without bending your knees. 用手够到你的脚趾, 膝盖别弯曲。