Some pulsars keep time better than the earth's most accurate clocks.某些脉冲星发送脉冲比地球上最精确的时钟都准时。They have discovered now , previou sly unimagined objects - pulsars, quasars, and black holes.他们发现了以往想象不到的新客体 —— 脉冲星 、 类星体和黑...
Buses and trains use much less fuel per person than cars.公共汽车和火车的人均燃料耗费量比轿车小得多。Freight trains travel slowly on upgrades into the hills.火车徐徐向山上驶去.Many trains have been cancelled and a limited service is operating on other...
胼胝质的染剂是苯胺蓝, 间苯二酚蓝和玫红酸.Callose stains are aniline blue, resorcin blue and rosolic acid.仔细看(连接左右半脑的)胼胝体.Take a close look at the corpus collosum.方法: 经胼胝体-透明隔 - 穹窿间入路切除颅咽管瘤10例.Methods: Cranipharyngioms in 10 cases were remo...
我们听着雨水打在屋顶的木瓦上.We listened to the rain on the shingle roof.木瓦重叠摞在一起.The shingles lapped over each other.木瓦的重叠部分至少应达到十英寸.The lap of the shingles should be at least ten inches....