Getting back into exercise can be a challenge in the best of times, but with gyms and in-person exercise classes off-limits to many people these days, it can be tricky to know where to start.

在境况最好的时候，重新开始锻炼身体也可能是一项挑战，但如今许多人都无法去健身房或参加面授的健身课程，就更是连从何处入手都很难知道。

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These are the things I want for you-to grow up in a world with no limits on your dreams and no achievements beyond your reach.

这些是我想要让你们得到的东西：在一个梦想不受限制、无事不能成就的世界中长大。

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The study found that young people used less media in homes with rules like no television during meals or in the bedroom, or with limits on media time.

这项研究发现年轻人在家不怎么遵循原则的使用媒体，像是不在吃饭时看电视、不在寝室看电视，或限制使用媒体时间。

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There were barriers. With dedication and perseverance anyone in this country can do anything they put their mind to and there are no limits.

VOA: standard.2010.02.02

The question is, "Are there inherent limits in our abilities to come up with grammars?"

这个问题是,"我们创造语法的能力,是否存在天生的局限"

耶鲁公开课 - 心理学导论课程节选

Controversial in the sense that maybe it's not a good thing to do, or there might be some limits on what we want to do there in terms of integrating machines with people's brains.

它的争议性在于这可能并不是一件好事,在我们想往人脑中植入机械时,会不会受到某种限制

耶鲁公开课 - 生物医学工程探索课程节选

Such features will greatly complicate efforts to monitor these weapons, particularly in connection with limits that might be imposed upon them in a future arms control regime.

CENTERFORSECURITYPOLICY: Center for Security Policy | An Assessment Of Future Requirements For US Strategic Forces And Strategic Arms Control

Even with these limits in place, the 2008 election is certain to set the fund-raising bar for elections to come.

FORBES: Magazine Article

The same problem exists if the GSEs were reconfigured as for-profit companies but with tighter limits in areas like risk exposure and executive compensation.

FORBES: Business In The Beltway