Alkaline means containing an alkali, or behaving like one. An alkaline solution has a pH above 7; an acid is below 7; 7 is neutral, like pure water.

Alkaline鹼性的 means containing an alkali意思是含有鹼，or或 behaving like one表現得像鹼一樣。An alkaline solution鹼性溶液 has a pH above 7pH值高於7；an acid酸 is below 7則低於7；7 is neutral7是中性，like pure water就像純水一樣。

Gardeners talk about alkaline soil. Shops sell alkaline batteries — a common kind of dry battery — and “alkaline water” as a health drink. Chemists are often calmer than the adverts about that drink: the word is being stretched toward “good for you,” which is not what it means in the lab.

Gardeners園丁 talk about alkaline soil會談到鹼性土壤。Shops店家 sell alkaline batteries販賣鹼性電池 — a common kind of dry battery一種常見的乾電池 — and和 "alkaline water"「alkaline water」（鹼性水） as a health drink作為一種健康飲品。Chemists化學家 are often calmer than the adverts about that drink對那種飲料通常比廣告冷靜得多: the word這個詞 is being stretched toward "good for you,"被延伸成「對你有好處」的意思, which而這 is not what it means in the lab並不是它在實驗室裡的意思。

The adjective is the usual use. There is also a rarer noun use for alkaline substances as a group, but students will meet the adjective far more. Built in English from alkali + the ending -ine.

The adjective形容詞用法 is the usual use是常見的用法。There is也有 also a rarer noun use比較少見的名詞用法 for alkaline substances as a group指一整群鹼性物質，but但 students學生 will meet the adjective far more會更常遇到形容詞用法。Built in English建於英文裡 from alkali + the ending -ine是由alkali加上字尾-ine組成。