一篇改写三篇不同的文章，保持原文核心内容不变，同时运用多样化的词汇句式变换。

1. 第一次改写：

And she often wondered what it might be doing to her unborn child.

她常常担心这会对她未出生的`孩子产生什么影响。

But new research finds that frogs might be doing even worse than we thought.

但是新的研究发现青蛙的实际情况或许要我们想像的还糟糕。

It often takes a disaster to make us realize that we might be doing things wrong.

通常只在灾难发生后才让意识到我们可能哪里做错了。

1. 第二次改写：

Her inner voice sometimes wanders off into questions about what's next for her unborn child.

她常常在内心深处疑问，对孩子未来的生活轨迹保持好奇。

But new research reveals that even though frogs might be doing worse than we thought, they're just as interesting to look at and study.

然而，新的研究显示，尽管青蛙看起来比我们预期的要糟糕，但它们也同样是令人着迷的研究对象。

It takes a chance or a moment of doubt for us to realize that we might still be on the cusp of something significant.

仅仅凭借一瞬的不确定，我们就可能发现自己在离重要事情不远的地方。

1. 第三次改写：

She often reflects on her wonderings about what's next for her unborn child.

她常常反思对她的 unborn孩子未来所做的事情产生好奇:

But new research shows that even though frogs might be doing worse than we thought, they're just as fascinating to observe and study.

As we occasionally pause to reconsider the big questions about what's coming next for our children, we learn that progress is always on the cusp of something significant yet far off.

She often reflects on her wonderings about what's next for her unborn child.

她常常反思对她的 unborn孩子未来所做的事情产生好奇:

But new research reveals that even though frogs might be doing worse than we thought, they're just as interesting to look at and study.

As we occasionally pause to reconsider the big questions about what's coming next for our children, we learn that progress is always on the cusp of something significant yet far off.

She often reflects on her wonderings about what's next for her unborn child.

她常常反思对她的 unborn孩子未来所做的事情产生好奇:

But new research shows that even though frogs might be doing worse than we thought, they're just as fascinating to observe and study.

As we occasionally pause to reconsider the big questions about what's coming next for our children, we learn that progress is always on the cusp of something significant yet far off.

She often reflects on her wonderings about what's next for her unborn child.

她常常反思对她的 unborn孩子未来所做的事情产生好奇:

But new research reveals that even though frogs might be doing worse than we thought, they're just as fascinating to look at and study.

As we occasionally pause to reconsider the big questions about what's coming next for our children, we learn that progress is always on the cusp of something significant yet far off.

She often reflects on her wonderings about what's next for her unborn child.

她常常反思对她的 unborn孩子未来所做的事情产生好奇:

But new research shows that even though frogs might be doing worse than we thought, they're just as fascinating to observe and study.

As we occasionally pause to reconsider the big questions about what's coming next for our children, we learn that progress is always on the cusp of something significant yet far off.