"We have about three or four of us that lace up our tennis shoes at our lunch hour, and we walk for 30 minutes every day."

VOA: standard.2010.07.16

But where I went to college, it's just over the bridge in the suburbs about 30 minutes.

但我的学校就在桥对面的郊外，差不多30分钟就能到。

与圣地亚哥不一样 - SpeakingMax英语口语达人

But the whole run, I think, lasts about 30 minutes now.

但是整个过程，我想，持续了大概30分钟。

关于伦敦眼的回忆 - SpeakingMax英语口语达人