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...
a pair of callipers一把测径规Ability to use Callipers, Micrometers , Gauges, Profile Projector, Gauge Block.能使用测径规, 千分尺, 测量仪表,轮廓测定投影器, 块规.And purchases special callipers to survey pinhole.并且购买特殊的卡尺来测量销孔....
禁毒专家说它可能会结束强效可卡因吸食泛滥的局面。Drug experts say it could spell the end of the crack epidemic.警察冲进去将他拘捕并没收了可卡因。The police moved in, arrested him and impounded the cocaine.强效纯可卡因是市面上最容易让人上瘾的毒品。Crack is the most addictive drug on ...
He frequently donates large sums to charity.他常常向慈善机构捐赠大笔钱款。A substance donates protons to some other substance.一物质向其他物质提供质子.Substance X in turn donates its electron to an iron - containing protein called ferredoxin.X物质又将...