traffic是可數(shù)名詞還是不可數(shù)名詞

　　Traffic雙語例句：

　　We should do something about the traffic problem.

　　我們應(yīng)當(dāng)對交通問題進(jìn)行整頓。

　　There was heavytrafficon theroads

　　道路上車流擁擠。

　　Air traffic had returned to normal.

　　空中交通已恢復(fù)正常。

　　Traffic is now flowing smoothly again.

　　現(xiàn)在，交通又暢通了。