【主题句子复现】
1. 飞机的发明极大地改变了世界。(have greatly changed)

2. 关于这两个问题，他们通过观察鸟类飞行找到了解决方案。(find their solutions by doing sth)

3. 飞机的发明使我们的环球旅行变得更加便捷和快速。(make sth adj.)

4. 曾经需要数天、数周甚至数月的旅程，现在只需几个小时就能完成。(once, even, only)

5. 因此，现在不同国家人民之间的交流变得更加容易，并且世界也变成了一个小得多的地方。(as a result)

1. The invention of the airplane has greatly changed the world.
2. For these two problems, they found their solutions by watching birds fly.
3. The invention of the airplane makes our round-the-world trips more convenient and faster.
4. Journeys that once took days, weeks or even months can now be completed in only a few hours.
5. As a result, communication between people from different countries has become much easier, and the world has become a much smaller place.

本题为汉译英专项练习，要求结合括号内给出的指定提示结构/词汇完成翻译，贴合九年级现在完成时、固定搭配的知识点：
1. 第1题需用提示短语have greatly changed，主语“飞机的发明”为单数，现在完成时谓语用has greatly changed。
2. 第2题需套用提示结构find their solutions by doing sth，by后接动名词形式表方式。
3. 第3题需使用提示的make sth + 形容词结构，用形容词比较级体现“更加”的含义。
4. 第4题需将指定词汇once、even、only准确融入句中，体现今昔对比的语义。
5. 第5题需用提示短语as a result引出结果，正确使用形容词比较级表达“更加容易”“小得多”的含义。