But how the transition from one business model to another will affect profitability-and which firms will benefit from it the most-is still very unclear.

可是从一种商业模式向另一种的转换将会对收益率产生怎样的影响—以及哪些企业将会从中受益最多—仍很不明朗。

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Teaching factor: Chemical teaching material is very difficult, professional feature is unclear, and it doesn't have close connection between junior school chemistry and professional course;

教学因素：化学教学内容难度大，专业特色不明显，与初中化学及专业课程衔接不紧密；

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It depends on" is very useful when you're trying to make a decision when things are unclear and you're waiting.

当你在形势不明朗，仍在观望而无法做决定的时候，"It depends on"句型是一个非常有用的句型。

It depends on 课堂 - SpeakingMax英语口语达人

It is still very unclear whether there will be an agreement before year-end and some legislators reportedly believe that it might be in their interest to enter the new year without striking a deal.

FORBES: Economic End Times Not So Near, U.S. Seen Surviving 'Fiscal Cliff'