But there is a limited amount of radio frequency spectrum available.

VOA: special.2010.03.19

One of the big problems with studying human diseases is that you can study how they occur in people but there's only a limited amount that you can learn from people.

在人类疾病研究中的一个难题是,你有能力研究发病原因,但以人类为样本做研究却是备受限制

耶鲁公开课 - 生物医学工程探索课程节选

Now, you may say this doesn't amount to a very limited government, and the libertarian may complain Locke is not such a terrific ally after all.

现在或许你会说，这并不算真正有限的政府，而自由主义者会抱怨洛克并不算他们的好盟友。

耶鲁公开课 - 公正课程节选

It limited the amount of money railroads could demand from people who needed to travel or transport their goods.

VOA: special.2010.05.06

They cannot harm themselves because the amount of painkiller in the pump is carefully measured and limited.

VOA: special.2010.05.04

She limited the amount of time they watched television.

VOA: special.2009.09.04