the expansion and contraction of the metal金属的膨胀与收缩Contraction of the timbers left gaps in the fence.木料收缩,结果围墙露出缝来.The forces of expansion are balanced by forces of contraction.扩张力和收缩力相互平衡....
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...
The barn went to wrack and ruin after the farmer moved.那农夫搬走之后,谷仓就废弃了.The wrack of the city was still hot from the fire.这城市的残骸,仍因火灾还是热的.black wrack墨角藻The wrack had begun to stink as it rotted in the sun.海草残骸在阳光下腐烂,开始变臭了....