电梯修理工可以转动这根杠杆直接操作机器。An elevator mechanic can work the machinery directly by turning this lever.锹和耙的手柄较长，可发挥较好的杠杆作用。The spade and fork have longer shafts, providing better leverage.我们不得不借助杠杆之力来移动这块巨石.We'll have to us...
Better that I'd learned to plow or chop cotton like a darky.还不如当初象黑人那样学会犁田、摘棉花呢.A Texas farmer grumbled that he had to plow his field.有位得克萨斯州的农场主嘟嘟囔囔地说,他得耕自己的地.At this time of the year farmers plow their fields.每年这个...
有机物和铀的浸染到处是共同延伸的.The organics and impregnations of uranium are everywhere coextensive.铜浸染在斑岩的细小节理面和裂隙中.The copper is disseminated in small joint surfaces and cracks in the porphyries.这些矿物也浸染在靠近粗玄岩接触带的片岩和角岩片岩中.The mineral...