再次，我为我讲得太快而道歉，但它仍然是个有用的练习，所以要好好看看课本中的内容。

Again, I apologize for going too fast but it's still a useful exercise I think, so have a look at it in the book.

youdao

再次，我为我讲得太快而道歉，但它仍然是个有用的练习，所以要好好看看课本中的内容。

Again, I apologize for going too fast but it's still a useful exercise I think, so have a look at it in the book.

youdao