你这会儿不是应该在参加试演吗？
在至少缴纳一期学费的情况下可参加试听。
You can attend class trial after you've paid tuition for at least one term.
研究报告在今年早些时候告诉了参加试验的人中谁患了直肠癌。
Research reported earlier this year told about people who had colorectal cancer.
这次参加试航的时候，这部分是由一块透明的塑料布保护起来的。
At the time of attendance, this was protected by a clear plastic sheeting.
只有试验结束，实验人员和参加试验的罪犯才知道他们服用的药剂。
Neither prisoners nor experimenters will know who got what until the trial is over.
如果是这样的话，则请她们前去参加试唱，以筹建一个新的演唱组。
If so, they were asked to turn up for auditions for a new group.
如果是这样的话，则请她们前去参加试唱，以筹建一个新的演唱组。
If so, they were asked to turn up for auditions for a new group.
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