A University of Michigan study had one group of participants take a 60-minute snooze, while a comparison group watched a nature documentary.
密歇根大学的一项研究让一组实验参与者小睡60分钟,而另外一组则观看了一部自然纪录片。
单词 | comparison group |
例句 |
原声例句
科普小杂文 A University of Michigan study had one group of participants take a 60-minute snooze, while a comparison group watched a nature documentary. 密歇根大学的一项研究让一组实验参与者小睡60分钟,而另外一组则观看了一部自然纪录片。 VOA Special 2022年6月合集 The study had no comparison group, but researchers said the results compare well to historical data for similar patients who had radiation. 尽管这项研究没有设对照组,但研究人员表示,他们的研究结果相比之下不亚于接受放疗的类似患者的历史数据。 VOA慢速英语_科技 He noted that since the study did not have a comparison group getting regular ECG measurements, there is no way of knowing if the device missed heartbeat problems. 他指出,研究并未让对照组接受常规心电图测试,所以无法知道该设备是否有错过的心跳问题。 |
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