常見(jiàn)例句If you look at a water filter, you can usually detect small chunks of charcoal inside of them.如果你看淨(jìng)水器一眼，你通常會(huì)發(fā)現(xiàn)它們的內(nèi)部通常會(huì)有一塊木炭。Hard water ismainly caused by calcium and magnesium, which can be removed with a watersoftener.硬水主要是因爲(wèi)溶在水裡的鈣和鎂，我們可以透過(guò)淨(jìng)水器來(lái)除去化們。 返回 water-cleaner