《红宝书》考研英语词汇
每日一句
Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs.
词汇突破
bipedal [ˌbaɪˈpiːdlˌˌbaɪˈpedl]
adj. 两足动物的；二足的
n. 两足动物
withstand [wɪðˈstænd; wɪθˈstænd]
v. 顶住，抵住；经受住，承受住（攻击、批评等）；反抗
limb [lɪm]
n. 肢，臂；分支；枝干
vt. 切断…的手足；从…上截下树枝
结构分析
该句的主干结构是：our feet and back (主语) + continue to struggle and cannot easily withstand (谓语) + strain (宾语)。even though 引导的是状语从句，imposed by oversize limbs 是简化的定语从句，完整的表达方法是 which is imposed by...，修饰 strain。
参考译文
此外，尽管人类已经直立行走了数百万年，但我们的脚和背部仍在与两足行走的姿势作斗争，无法轻易承受过大肢体带来的反复压力。
