The method was established for purification of diflubenzuron by crystal technique with mixed solvents.本文论述了利用混合溶剂——结晶法提纯除虫脲的分析技术.The separation and determination of the primary impurities of diflubenzuron by liquid chrom...
浅滩上的潮水逐渐退去。The tidal stream or current gradually decreases in the shallows.潮水已经退去，他们走过岩石区的潮水潭。The tide was out and they walked among the rock pools.潮水小的时候强风可以让船只改变航向。Strong winds can turn boats when the tide is weak....
输掉一场比赛会让他暴跳如雷。Losing a game would cause him to fly into a rage.伯恩斯坦输掉了官司，但从未因此而怨恨格伦迪。Berns-tein lost the case, but never held it against Grundy.“我们不能输掉这场战争！”他得意地喊道。"We cannot lose the war!" he shouted exultantly....
The major mineral association in keratophyre rocks from Donggouba area is actinolite + chlorite + epidote + pumpellyite + albite.东沟坝角斑岩中主要共生矿物组合为阳起石+绿泥石+绿帘石十绿纤石+钠长石.Mineral constituents consist mainly of jadeite, aegirin...
这家商店每星期五早晨盘点存货.The shop takes stock every week on Friday mornings.下星期我们暂停营业盘点存货.Next week we shall be closed for stock - taking.这家食品店每周盘点存货.The food store took stock every week....
随着水星的靠近,将上演一场行星三重唱.And with Mercury close by this makes for a planetary trio.集体表演称之为二重唱 、 三重唱 、 四重唱以及大合唱等等.Groups are called duets, trios, quartets , choruses , choirs, etc.很快地二重奏形成了三重唱.Soon the duet will become a trio....
Remedial action is always expensive and, in some cases, may actually exacerbate the problem.补救工作总是代价很大,并且在某些时候反而会使问题更严重.Reassessing the environment quality after the remedial measure is taken.采取措施后,再评价环境质量.Is remedial ex...