most sweeping emissions trading system companies would have to buy permits for every ton of carbon they emit, a system designed to provide financial incentives for those that reduce their pollution.

VOA: standard.2009.05.03

They have a ton of running trails, so I really like to do that

公园里有无数的跑道，所以我喜欢在那儿跑步，

在空闲时间 - SpeakingMax英语口语达人

You really want to get the power of dividing things up, but if you end up doing a ton of work at the combination stage, you may not have gained anything.

你真的想得到分解问题的能力,但是如果在合成的某个阶段,你需要做大量的工作，你可能得不到任何东西。

麻省理工公开课 - 计算机科学及编程导论课程节选