water後用單數還是複數 the outlet hole can connect with several pipes to where hot water is needed. 這句中,water後用is有沒錯

water後用單數還是複數 the outlet hole can connect with several pipes to where hot water is needed. 這句中,water後用is有沒錯

water是不可數名詞,要用單數.
當water用複數時,表示河流