稍后，我意识到一些零件(如后减震器)可以保护我的背部和我自行车的框架在德克萨斯州高低起伏的山区中免受损害。

Later, I learned that some components, such as a rear shock absorber, protected my back and my bike's frame from the many ledges in the Texas hill country.

youdao

位于凤凰城东南42英里(67.59公里)处的封闭社区里奥·贝尔德是一个高尔夫乡间俱乐部度假村，距麦克道尔山区公园只有五分钟的路程，游客可以步行或骑自行车去。

Rio Verde, a gated community 42 miles northeast of Phoenix is a golf country club resort. It is just five minutes from the McDowell Mountain Regional Park where visitors can hike and bike.

youdao

通过对山区高速公路行车速度进行分析，提出限速的必要性。

Through analysis to driving speed in mountainous area expressways, this paper summons the necessity of speed limiting.

youdao