our national transportation policy.

　　我們國家的交通運(yùn)輸政策

　　The group was considered to be a risk to national security.

　　這伙人被認(rèn)為是威脅國家安全的危險(xiǎn)分子。

　　Class sizes in the school are below the national average.

　　這所學(xué)校班上的人數(shù)少于全國平均數(shù)。

　　He's a talented athlete who competes nationally and internationally.

　　他是一位有才華的運(yùn)動(dòng)員，既參加國內(nèi)比賽，也參加國際比賽。

　　The programme was broadcast nationally.

　　這個(gè)節(jié)目曾在全國播放過。

　　The president's popularity nationally is at an all-time low

　　總統(tǒng)在全國的人氣目前正處于歷史最低點(diǎn)。