Thirty minutes a day in the early elementary years and an hour in grades four, five, and six is standard, says Rosemond.

罗斯蒙德说，低年级的标准是每天30分钟，四、五、六年级的标准是每天1小时。

youdao

I only have thirty minutes to clear customs in getting to the city center and it means I have to check in by five-thirty, which means leaving home at about four fifteen.

我只有30分钟的时间来办理去市中心的海关手续，这意味着我必须在5点30分办理登机手续，也就是说我必须在4点15分左右离开家。

youdao

Then we have four lessons, fourty-five minutes for each. We are off school at eleven-thirty.

然后我们有四节课，将每五分钟。我们离学校一一三零。

youdao

After another thirty minutes, only four kites remained.

又过了半个小时，只剩下四只风筝了。

youdao

After another thirty minutes, only four kites remained.

又过了半个小时，只剩下四只风筝了。

youdao