常見例句If you look at a water filter, you can usually detect small chunks of charcoal inside of them.如果你看凈水器一眼，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?yàn)槿茉谒锏拟}和鎂，我們可以透過凈水器來除去化們。 返回 water-cleaner