They debated the issue pro and con.
他们从正反两方面讨论这个问题。
We should argue the matter pro and con.
我们应从正反两方面辩论问题。
They advanced arguments pro and con the proposal.
他们提出了赞成和反对那提议的论据。
In approach number one, you simply lay out the various positions, pro and con, and the professor strives to remain neutral; sort of not tip his hand about what he holds.
方法一,你们简单的列出不同的观点,正面和反面,老师争取保持中立;,不表明他支持哪边。
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