In practice a graduate tax is an administrative nightmare.毕业税具体操作起来不啻一场行政噩梦。In practice, workers do not work to satisfy their needs.事实上，工人工作并不是为了满足本身的需要。It'sounded like a good idea, but in practice it didn't wo...
然后把片子浸入含有很多碘的墨水中.The sheet is then dipped into an ink solution rich in iodine.氯和碘的化合物的蒸气是有毒的.The vapour of the choro and iodo compounds in particular, can be toxic.例如,硫代葡萄糖苷能干涉甲状腺对碘的吸收.Glucosinolates can interfere with u...