报道一种快速检测冰箱除臭器对乙硫醇驱除效率的气相色谱分析方法. A gas chromatographic method to quickly test the efficiency of refrigerator deodorizer in eliminating ethanethiol paper.
Catherine put all the envelopes aside unopened.凯瑟琳把所有信件放在一旁，全都未启封。We've gone through all those envelopes I bought last week.我们用完了我上周买的所有的信封。A courier was despatched with two sealed envelopes.信使受命递送两封封讫的信。What is the...
Celestite is usually diagenetic but commonly forms very early in the history of the sediment.天青石一般是成岩期的,但通常是在沉积史的极早期形成的.Reduction - metathesis method for preparation of strontium carbonate from celestite is developed.提出还...