our national transportation policy.
我们国家的交通运输政策
The group was considered to be a risk to national security.
这伙人被认为是威胁国家安全的`危险分子。
Class sizes in the school are below the national average.
这所学校班上的人数少于全国平均数。
He's a talented athlete who competes nationally and internationally.
他是一位有才华的运动员，既参加国内比赛，也参加国际比赛。
The programme was broadcast nationally.
这个节目曾在全国播放过。
The president's popularity nationally is at an all-time low
总统在全国的人气目前正处于历史最低点。