1. At the same time, more of this newly discovered oil is of the type that requires a greater investment to refine. 与此同时，在这些新发现的石油中，更多是需要加大投资才能提炼的类型。
2. Can they refine the idea and resubmit it? 他们能改进一下想法然后重新提交吗？
3. Instead of trying to refine old formulas, they invent new ones. 他们不是试图改进旧的公式，而是发明新的公式。
4. Only after establishing a set of desirable location options should companies refine choices using cost-based factors. 只有在建立了一套理想的地点选择之后，公司才应该使用基于成本的因素来完善选择。
5. Indeed, work with some other species suggests they too can refine their quantitative thought if they are introduced to the cognitive power tools we call numbers. 事实上，对其他一些物种的研究表明，如果引入我们称之为数字的认知工具，它们也可以完善自己的定量思维。
