正常的双螺旋DNA是螺旋形的, 像一根松松地卷曲的弹簧.Normal, double - helix DNA is spiral, like a loosely coiled spring.这就是双螺旋.This is the double helix.由此产生的双螺旋结构减少了摩擦,并允许更快, 更容易系带.The resulting double helix reduces friction and allows faster, e...
Their troops were hemmed in on three sides by enemy detachments.他们的军队被敌军三面包围.I can't stand the cool detachments from my antagonists!我不能忍受来自我那些反对者的冷眼!The detachments made use of diversionary tactics to stand the enem...
The device automatically disconnects the ignition when the engine is switched off.当引擎关掉时，这个装置会自动切断点火开关。The ignition of methane gas killed eight men.甲烷起火，致使8人丧生。I must have left my key in the ignition.我肯定是把车钥匙忘在点火开关上了....
He lives on a cattle ranch in Australia.他在澳大利亚靠一个牧牛场为生。On his ranch in Crawford, Texas, the President keeps longhorn cow named Ofelia.在他得克萨斯州Crawford农场, 布什总统养着一头名叫Ofelia的长角牛....an old ranch house that has been converted ...