?一条建议

可以说a piece of advice(一条建议),也可以说 some advice(一些建议),但不能说an advice。 例如:

?一条忠告

名词 ... a pane of glass一块玻璃 a piece of advice一条忠告 a pot of jam一罐果酱 ...

?一项忠告

... a tin of pork一个猪肉罐头 a piece of advice一项忠告 a game of chess一盘棋 ...

?一条意见

... learn on sb for advice向某人请教,靠某人指教 a piece of advice一条意见 a word of advice一条意见 ...