But the environmental waste expert concedes that for the time being, landfills are the only practical option.

VOA: standard.2010.08.05

That is only option 1. We have like 9 more slots to fill.

这只是1个选择，我们还有9个其他选择。

哈佛公开课 - 计算机科学课程节选

putting all those things together, if you looked at this question again we'd get 100% on it, 0 9 that our only option here is 0. 9, and that it's not the negative, it's the positive version, because we're talking about how much energy we have to put into the system in order to eject an electron.

把这些放在一起，你们再看一下题目,大家100%都能选对，我们唯一的选择就是这个，它不是负数，它是正的，因为我们说的，是要,把电子激发出来,需要提供的能量。

麻省理工公开课 - 化学原理课程节选

He said he never takes any option off the table, but that such a move would only delay Iran's nuclear weapons development by a few years.

VOA: standard.2009.12.12

This is very easy molecule because we know exactly where to put them without even having to think, we only have one option, and we'll make a triple bond between the carbon and the nitrogen.

这个分子非常简单,因为我们知道应该把它们放在哪里,甚至不用去想，我们只有一个选择，我们将在碳与氮之间形成一个三键。

麻省理工公开课 - 化学原理课程节选

Liberals within the Democratic Party have been fighting for a public option, saying that it is the only way to spur private insurance companies to keep costs down and offer affordable plans to consumers.

VOA: standard.2009.10.26

Schanzer says the only other option for Israeli would be for Hamas to relinquish its control of the Gaza Strip and allow for a new, unity government to control both Gaza and the West Bank.

VOA: standard.2010.06.17