词汇讲解：

1. exploration n.探测，勘探
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. extend vt. 延伸;扩大
例句：This will extend the life of the drive.
这样会延长驱动装置的寿命。

3. discover vt. 发现
例句：You shall not discover it to any person in the world.
你不要向世上任何人道破这件事。

4. confront vt. 面对;使面对面
例句：A soldier has to confront danger.
军人须面对危险。

5. disappear vi.不见，消失
例句：It's really surprising! How can 50 tins of goods disappear without trace?
这太奇怪了！50箱货物怎么会消失呢？
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