英语语法分析

Professor Stevenson, as an economist, how do you look upon the surging Chinese economy?

史蒂文森教授，作为一名经济学家，你如何看待中国经济的高速增长？

When Stevenson followed the carbon-14 trail back in time, he found carbon-14 levels change with the intensity of solar burning.

当史蒂文森依据碳-14的痕迹追溯过去时，他发现碳-14的含量随着太阳燃烧的强度而变化。

Luckily, Ian Stevenson and his friends saw the baby hippo.

幸运的是，伊恩·史蒂文森和他的朋友们看到了小河马。