交通标志和减速振动标线对于防止交通事故有重要的作用，也是山区公路主要的交通安全设施。

Traffic signs and deceleration vibration marking are important for the prevention of traffic accidents, it is also the main mountain road safety facilities.

youdao

飞机对准1500英尺的地面标线，减速，并且降低高度到300英尺左右。

I line up on the 1,500-foot show line, slow the jet down, and go down to about 300 feet or so.

youdao

飞机对准1500英尺的地面标线，减速，并且降低高度到300英尺左右。

I line up on the 1,500-foot show line, slow the jet down, and go down to about 300 feet or so.

youdao