自然实验
If the Great Depression had not happened 80 years before, there may not have been a natural experiment to draw upon, and perhaps 2009 might have turned out differently.
如果80年前没有发生过大萧条,我们可能就不会有可以利用的自然实验,或许,2009年的情况就会完全两样了。
" C/ LiNEAR was terrific natural experiment," Weaver said.
C/LINEAR是一个没有人为因素的实验,维沃说。
By natural experiment method and discussion method, we explored the role of examples in the establishment of ideological and moral education on juveniles.
本研究通过自然实验法、座谈讨论法,对榜样示范在未成年人品德形成机制中的作用进行了探讨。
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