The summer after 7th grade, students spend three weeks on a college campus studying advanced math for seven hours a day.

七年级后的那个夏天，学生们要在大学校园里待上三周，每天学习七个小时的高等数学。

youdao

He would disappear for weeks on end.

他常常是连续几周不见人影。

《牛津词典》

"Otherwise, I would never speak to another person for weeks on end," she said.

她说：“否则，我就不会连续几周都和别人说话了。”

youdao

He warned about the deepening recession in a speech in Virginia on Thursday, less than 2 weeks before he takes office.

VOA: special.2009.01.09

Because the child who is dying because you are not treating the child might die slowly over days or weeks depending on the child's condition, obviously.

如果让这个孩子,由于放弃治疗而死去,他可能会在几天甚至几周内慢慢死去,当然要看孩子自身的身体情况。

普林斯顿公开课 - 人性课程节选

So, we devoted a lecture early on--of a couple of weeks ago, to individual differences across people in intelligence and personality.

几周之前我们用了一整节课，来讲人与人之间的智力与个性差异。

耶鲁公开课 - 心理学导论课程节选

"I am sitting here five weeks on talking about another major incident, " said O'Neill.

BBC: Fuming O'Neill blasts John Terry tackle on James Milner

And there will be several events over the next few weeks on that topic.

WHITEHOUSE: Press Briefing

In her first weeks on the job, Washington was consumed with controversial fiscal cliff negotiations.

FORBES: New Director Of Senate Finance Committee Warns Of Looming Debt Ceiling