This article introduced a method for preparing α - chloro - isobutylaldehyde , in order to explore a practical chloration of oxo - compound. 本文介绍了制备氯代异丁醛的方法, 其目的在于探索羰基化合物的一种实用的氯代方法.
If we had listened to them, this hydropower station would never have been built.当初要是依了他们的主张, 今天就不可能有这个水电站.hydropower utilization水能利用Hydropower produces about 15 % of the world's electricity, % for other renewables.水...
All programmes will be either "signed" or subtitled.所有节目要么要配手语要么要打字幕。"Lorna Doone" is subtitled "a Romance of Exmoor".小说《罗娜·杜恩》的副标题是“埃克斯穆尔绝恋”。Much of the film is subtitled.电影的大部分都有字幕。...