他们不得不选择最佳的途径继续研究。

They just have to choose the best path to pursue.

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然后，在这项研究的最后两天里，他们可以选择他们吃什么。

Then, on the last two days of the study, they could choose what they ate.

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我们必须将研究进行下去，让人们知道他们还有别的选择。

We must go through with the research and make people aware so they have a choice.

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这本书由为他们的临床的价值选择的案例研究组成。

This book consists of case studies selected for their clinical value.

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这本书由为他们的临床的价值选择的案例研究组成。

This book consists of case studies selected for their clinical value.

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