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1·At some 1,000 miles, the Mackenzie is the longest river in Canada.

麦肯齐河是加拿大最长的河流，全长约1000英里。

2·At some 2,300 miles in length, the Mississippi is the longest river in the United States.

密西西比河全长约2300英里，是美国最长的河流。

3·It will take an hour at the longest.

这事最多花一小时。《牛津词典》

4·It was my longest motorcycle ride yet, at about 175 miles, and I experienced freezing my ass off for the first time too.

这是我骑摩托车最长的一次，大约175英里，我第一次感觉自己的屁股都快冻僵了。

5·Four of the top 10 longest rivers flow through China at some point.

十条最长的河流中有四条都流经中国。

6·He created paintings of trains between January and March in 1877, at the train station with the longest history in Paris.

1877年一月到三月，他在巴黎历史最悠久的火车站创作了一系列火车画作。

7·At nearly 3,200 kilometers long, it is the world's longest man-made waterway.

其全长近3200公里，是世界上最长的人工水道。

8·The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon.

夏季奥运会最长的田径项目是50公里竞走，比马拉松距离还长大约5英里。

9·The river system of the Mississippi River and the Missouri River is the longest river system in North America at 3,902 miles.

密西西比河和密苏里河水系是北美最长的水系，全长3902英里。

10·Then came the real test, at one of the longest wave simulators in North America.

然后进行的是现场实验，就在北美最长的一个波浪模拟器里。