In the past doing without tail fins would have created an aircraft that is difficult to fly. But things have now changed.

在过去，没有尾翼的飞机很难飞行，然而，现在情况发生变化了。

youdao

But now things have changed because of a horrible experience.

但是因为一次可怕的经历，事情发生了改变。

youdao

But now things have changed.

但是现在情况就不一样了。

youdao

But since that day, things have changed as there now appears to be something new to worry about on a daily basis and all the news seems to be bad news.

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