Yet molecules are always moving, some perhaps as fast as a mile per second.

分子仍然总在行为，其中有些分子的行为速度磁缦憧秒一英里。

youdao

Mongolia is the second least populated country with just 4.2 people per square mile.

蒙古是只有4.2秒，每平方英里人口最少的国家的人民。

youdao

The rates (per ton-mile) for grain are second-lowest of any commodity, trailing only coal, White said.

除煤炭外，谷物（按吨英里算）是所有商品中运费最低的一种商品，怀特说。

youdao

It offers 56 megabits per second over a 30-mile radius. (The current standard is 11 megabits per second over a half-mile.) Wi-Max antennas on roofs and water towers will spring up like crazy and may begin to threaten the cable and local telephone empires.

FORBES: Tech Stocks at a Crossroads