1. exploration n.探测，勘探，探险
例句：These islands were a crucible of exploration and development.
这些岛屿是对开发和发展的严峻考验。

2. observe vt.观察; 研究
例句：As a child, he liked to observe the behaviour of insects.
他小时候喜欢观察昆虫的习性。

3. discovery n. 发现，发觉
例句：The discovery is due to Newton.
该发现应归功于牛顿。
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