He is such a subtle and careful observer.

他是一位如此精细的观察者。

I can see you're a careful reader as well as a careful observer.

我能看出你既是一位细心的读者，又是一位观察者。

Furthermore, if you area careful observer, you can learn much during your travel about the geography, biology, and history of the places you visit.

此外，如果你仔细观察区，您可以了解在你的有关地理，生物，旅游多，和您访问的地方的历史。

Furthermore, if you area careful observer, you can learn much during your travel about the geography, biology, and history of the places you visit.

此外，如果你是一个细心的观察者，在你的旅行过程中你会学到许多有关当地的地理、生物和历史方面的知识。

Furthermore, if you are a careful observer, you can learn much during your travel about the geography, biology, and history of the places you visit.

此外，如果你是一个细心观察的人，你就可以在你的旅途中学到很多东西关于地理、生物和历史方面的知识。

The agency was as conservative and careful as it could in compiling the report, he told the Observer.

他告诉《观察家报》的记者，机构在撰写报告时十分的保守和小心翼翼。

Yet to an observer outside, keeping a careful watch on the heavens, such an inexorable fate can never be observed.

然而，对于外部的观察者来说，仔细地观察天空，是永远不可能观察到如此无可变更的命运。