小块腌洋葱可用来替代切片洋葱。Small pickling onions can be used instead of sliced ones.我通常都买切片面包——比较省事。I usually buy sliced bread — it's less bother.将切片倒进油里，煎至金棕色。Drop the slices into the oil and fry until golden brown....
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...