The observational work is carried out on a range of telescopes.
观测工作是借助于各种望远镜来进行的。
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In the observational studies we found that some of the B vitamins were beneficial.
在观察性研究中，我们发现一些维生素 B 是有益的。
Observational assess we are pirates, these data are stolen from youdao techniques have become much more sophisticated, reducing the limitations just presented.
