人体的免疫系统是抵御疾病的主要屏障。The immune system is our main defence against disease.肾上腺分泌人体的大部分性激素.The adrenals produce a large per cent of a man's sex hormones.骨骼和肌肉是人体的组成部件.The bones and muscles are parts of the mechanism of ...
Trial rats had been done the partial hepatectomy after they were feed by AAF.用AAF灌喂大鼠后行肝部分切除,分时段检测肝功.The AAF adopted a very similar set , the SCR - 540 .陆军航空队接收到非常相似的装备——SCR -540.Evaluation of air - to - air tactics ( AA...
The spade and fork have longer shafts, providing better leverage.锹和耙的手柄较长，可发挥较好的杠杆作用。He sank the spade into the ground, and went at it.他把铁锹插到地里，开始卖力地干了起来。The spade sank into a clump of overgrown bushes.铲子插入了一丛长势旺盛的灌木丛。...