Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...
Her voice has deepened and coarsened with the years.她的声音随着岁月流逝变得低沉而沙哑。He had coarsened his voice to an approximation of Cockney.他让自己的口音变得粗俗起来，接近伦敦东区的发音。Her hair gradually coarsened as she grew older.随着年龄的增长，她的头发逐渐变粗糙了。...
They just cleave the stone along the cracks.他们就是顺着裂缝把石头劈开。The water is going to cleave a channel into the rock.水流将在大山中冲出一条峡谷来.The tribe cleave to their old belief even after the european arrive.即使在欧洲人到来之后,这些部落仍固守著它们古老的信仰...
油轮紧卡在礁石中间动弹不得。The tanker is stuck fast on the rocks.海水冲击礁石, 激起高高的浪花.Swashing against the rocks, the breakers sent up a fountain of spray.海浪冲击着礁石, 飞起像珠子般的水花.The wave lashed against the rocks, sending up pearly spray....
那座钟在几小时以前就停了.That clock ran down hours ago.座钟指着 七点二十—— 该是 十九点二十 啦.The clock's hands said seventeen - twenty : it was nineteen - twenty really .他注意到壁炉架上的座钟已是九点了, 那就是说二十一点.He noticed that the clock on the mantelpiece ...
As we drew nearer to it the water gradually deepened.我们靠近它时，水渐渐深了起来。Our struggle against pornographic and illegal publications continuously deepened.“扫黄”、“打非”斗争不断深入.As the night deepened, Huck began to nod, and presently...