关于这个问题，粗略地说，我们每周能收到大约五十封来信。
Roughly speaking , we receive about fifty letters a week on the subject.
关于那名隐居者邻居们所知道的就是他已经在那栋楼里住了大约二十年了。
All that neighbours knew about the reclusive man was that he had lived in the building for about 20 years.
在一半的案例中，实验者在提供关于研究的口头说明的同时，会轻轻拍拍学生的肩膀，持续了大约一秒钟的时间。
In half the cases, the experimenters patted the students lightly on the back of the shoulder for about one second while providing verbal instructions about the study.
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