🗣️ 情景例句
I have to return this book to the library.
我得把书还回图书馆了。
So far I have been learning about England.
到目前为止，我一直在研究有关英格兰的事情。
will finally become so steep that we can live no longer,
但最终会急转直下，我们也无法再活下去了。