CEabbr.化学工程师（=Chemical Engineer）abbr.土木工程师（=Civil Engineer）ceazyadj.摇晃不稳的(歪斜的；疯狂的)

1. The quadriceps muscle brings your knee into full extension.
   四头肌肌肉让你的膝进入完全的延长。
2. She had to concentrate on flexing her pectoral muscle, or the triceps, to power the arm.
   为了给手臂提供力量，她不得不用力伸缩她的胸肌或者三头肌。