The most economical mechanism for tight shutoff is the impactor handwheel.要做到紧密关闭,最经济的机械装置就是冲击式手轮.The impactor is estimated to be the size of several football fields.估计造成撞击的小天体大概有数个足球场大.Grimlock and Impactor meet Megatro...
They became suspicious of his behaviour and contacted the police.他们开始觉得他行为可疑，便报了警。He contacted with me.他曾和我有过交往.We contacted with the ship by radio.我们通过无线电与那只船取得了联系....
The bulb of Amaryllis vittata was used explant to establish the technique system of tissue culture.本研究以鳞茎盘为外植体建立了朱顶红组织培养的技术体系.The explant tissue culture was compared with the trypsin digestion culture.对比了组织块培养和消化培养两种培养方法...
His legs were curled beneath him in a foetal position.他的腿蜷缩在身下，就像胎儿的姿势一样。She lay curled up in a foetal position .她像胎儿一样蜷曲地躺着。Some foetal malformations cannot be diagnosed until late in pregnancy.有些胎儿的畸形部位得等到妊娠后期才能诊断出来。...