The combined contraction of the atria and ventricles is a heartbeat.心房和心室的这一系列动作合称为一次心跳.During inhalation, contraction of the intercostal muscles elevates the ribs.吸气时肋间肌收缩,提起肋骨.The surface electromyogram ( EMG ) and int...
Matty saw him go loping off, running low.马蒂看着他大步慢慢跑远。Matty, the College Board made millions of dollars last year.麦蒂, 大学委员会去年捞进几百万美元.Then she'll make appointments for me and Matty with her dad's firm.然后她会让我和麦蒂跟他...
A patient will usually listen to the doctor'sadvice and act on it.患者通常都会遵照医嘱行事。Many people act on impulse without counting the cost.很多人不考虑后果就莽撞行事。Don't act on caprice. Study your problem.不要任性行事, 研究一下自己的问题....