main1/men; meIn/adj [only before noun 仅用于名词前]1 bigger or more important than other things 主要的﹐最重要的: the main meal of the day 一天中的正餐The main problem is the cost. 主要问题是费用。the main reason for his decision 他作这个决定的主要原因2 the main thing spoken used to say that something is the most important thing in a situation【口】最要紧的事: You’re safe, that's the main thing. 你平安无事﹐这是最重要的。
main2n [C] 1 a large pipe carrying water or gas, which is connected to people's houses by smaller pipes〔自来水或煤气的〕总管道: a water main 自来水总管道2 the mains BrE 【英】a) the place on a wall where you connect equipment to the electricity supply〔墙上的〕电源 b) electricity that is supplied through wires, or water or gas that is supplied through pipes〔电﹑水﹑煤气的〕供应系统: mains electricity/water/gas Some of the older houses do not have mains electricity. 有些较老的房子没有供电系统。3 in the main spoken generally【口】大体上,基本上: The weather was very good in the main. 天气总的来说非常好。