The hydrogenation can be controlled to produce any degree of hardness desired in the product.為了生產(chǎn)所需要的任何硬度的產(chǎn)品,可對(duì)氫作用加以控制.Its hydrogenation activity in aromatics saturation and ring opening activity were investigated.芳烴加氫飽和...
這本敏感的書(shū)謹(jǐn)慎、簡(jiǎn)潔地討論了收養(yǎng)這一微妙問(wèn)題。This sensitive book tackles the delicate issue of adoption with care and simplicity." 我們現(xiàn)在的防御工事距離市區(qū)只有一英里遠(yuǎn)."蘭德?tīng)栮?duì)長(zhǎng)簡(jiǎn)潔地說(shuō)." Our present fortifications are only a mile from town,'said Captain Randa...
With a low-pitched rumbling noise, the propeller began to rotate.伴隨著隆隆的低沉噪聲，螺旋槳開(kāi)始旋轉(zhuǎn)起來(lái)。The engine turned a propeller.發(fā)動(dòng)機(jī)使螺旋槳旋轉(zhuǎn)起來(lái)。The freighter fouled its propeller in fishing nets.貨船的螺旋槳被漁網(wǎng)纏住了。...