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。

youdao

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。

youdao

It will take an hour at the longest.

这事最多花一小时。

《牛津词典》

Today,the research program at Gombe represents one of the longest continuous wildlife studies in the world.

VOA: special.2009.11.18

I would expect, whether you're a Red Sox fan or not, you to be able to look at a list of different pitchers and their average velocity for their fastball, and tell me who has the longest or the shortest wavelength.

无论你是否是一个红袜队球迷，我预想你会看到一系列,不同的投手和他们,投出快球的平均速度，告诉我谁有最长的,或者最短的波长。

麻省理工公开课 - 化学原理课程节选

At the time, it was the longest suspension bridge in the world.

VOA: special.2009.03.04

Normally, it takes the human process from six to nine months at the longest, we hope.

NPR: After Peace Deal, Next Steps in Darfur

Not to mention, this has all occurred at a time when unemployment is at its longest streak above 8.0% since the Great Depression.

FORBES: Energy Secretary Chu's Hopeless Clean Energy Crush

Some meals might go over to 45 minutes (at the longest).

FORBES: Dine Without Dashing: 5 Tips On How To Enjoy The 30 Minute Executive Lunch