氯用来给水消毒。Chlorine is used to disinfect water.给水加热时, 它会变成蒸气.When heated, water changes into vapour.可以毫不夸张地说,有成千上万座混凝土水坝正在供灌溉,给水 、 防洪 、 发电之用.Literally thousands of concrete dams are providing water supply shortage, irrigati...
I heard the engines revving as the lorries backed and turned.卡车倒车和掉头的时候，我听见发动机的轰鸣声。The colonel ordered, "I want two good engines down here asap."上校命令道：“尽快给我找两台性能好的发动机来。”Police with riot gear and several fire engines are ...
A three course dinner completes the culinary delights.做三道菜的一餐就能包含烹饪的所有乐趣。This one completes the set.加上这一件就凑成全套了.There is an express service from Paris which completes the journey to Bordeaux in under 4 hours.从巴黎有快车前往波尔多，...
Territorial disputes were resolved in guatemala's recognition of belize in 1991.领土争端在1991年危地马拉承认伯利兹后得到解决.Surface temperature and spectral measurements at Santiaguito lava dome, Guatemala.在危地马拉Santiaguito熔岩圆盖地面温度和光谱测...