Had you already spoken so clearly on these questions, you would not be asking them.
如果你已然能对这些问题讲得如此清楚，你也就不会提出来问了。
Most of these questions had nothing to do with his lessons.
这些问题大多与他的功课无关。
Once these questions had been clarified, we were able to gain the initiative.
这个问题清楚了，就使我们取得了主动。
Some answer must be had to these questions.
必须找出这些问题的答案。
These questions I had to answer for myself.
这些问题我都得自己回答。
Some answers must be had to these questions.
必须找出这些问题的答案。
These questions I had to answer for myself.
这些问题我不得不回答我自己。
Some answer must be had to these questions.
这些问题都得找到答案。
Yet very little empirical work had been done on these questions until recently.
然而以观察和实验为基础的工作直到近年来才开始有所起色。
Yet very little empirical work had been done on these questions until recently.
然而以观察和实验为基础的工作直到近年来才开始有所起色。
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