The process comprises first oligomerizing isobutylene to diisobutylene using a sulfonic acid type ion exchange resin.所述的方法包括首先异丁烯用磺酸型离子交换树脂低聚生成二聚异丁烯....
目的: 初步探讨一种全牙列晚期牙周病重度松动牙保存修复的新方法.Objective: To explore a new method of restoring complete while dentition periodontitis stressed syllable looseness teeth....
这对于杜鲁门来说似乎是一项特别不明智的事业。It seemed a singularly ill-judged enterprise for Truman to undertake.他们都说“这太不靠谱了，一点儿都不明智”。They all said "This is crazy, this makes no sense".她承认自己的举动是不明智和错误的。She accepted that she had acted unwisely...
They used an air compressor to take in atmospheric air , compress it, and force it into the cabin.他们用一台空气压缩机把大气中的空气吸进来, 加以压缩, 然后送入船舱.The compressor - outlet pressure is nearly constant around the circumference.压气机出口压力沿圆周...