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1.[obn]主要的；最重要的being the largest or most important of its kind

1.[c]（通往建筑物的）主管道，总管，输电干线a large pipe that carries water or gas to a building; a large cable that carries electricity to a building

3.[u][pl]水源；煤气源；电源；（水、煤气、电等的）供应系统；下水道系统the place where the supply of water, gas or electricity to a building or an area starts; the system of providing gas, water and electricity to a building or of carrying it away from a building

in the main

大体上；基本上used to say that a statement is true in most cases

1.主要的,主,全,总

2.充分的,尽量的;全力的,有力的

1.体力,气力;力;主要部分,要点

2.(自来水,煤气等的)总管;干线,干管

3.〈诗〉大海,大洋;〈古〉本土

4.【航】同“mainsail. water from the main”

1.〈美俚〉把(海洛因等)注射进静脉

1.most important, largest, or most frequently used

1.[Navigation]Same as mainsail. water from the main

2.a large pipe or wire used for carrying water, gas, or electricity

3.the public supply of water, gas, or electricity; the point where the supply of water, gas, or electricity enters a building or room