宾州煤的蕴藏量为三百五十亿吨.Pennsylvania sits on 35 billion tons of coal.一茶匙中子星上的物质重达十亿吨.One teaspoonful of material from a neutron star would weigh a billion tonnes....
他打电话给劳拉看她是不是好些了。He'd phoned Laura to see if she was better.劳拉在一家时尚画廊找到了份美差。Laura landed a plum job with a smart art gallery.劳拉松开离合器踏板，沿车道慢慢驶离。Laura let out the clutch and pulled slowly away down the drive....
Her face had already lost its puppy-fat.她的脸已经不再肉嘟嘟的了。The puppy has done a piddle on the carpet.小狗在地毯上撒了一泡尿.a playful puppy顽皮的小狗It wasn’t easy to lose puppy fat when Mum fed her on stodgy home cooking.母亲给她吃易饱的家常菜，她想减掉婴儿肥可...
Dewax are first done by boiling and second by warm water.退蜡沸水退蜡,二次退蜡用温水.The dewax rate is controlled by the diffusion of paraffin wax in poly propylene.热脱蜡的动力学控制步骤为石蜡在聚丙烯中的扩散过程....