发射日程一旦更改了，就很难再跟上进度了。

Launch schedules change, and it's difficult to keep up with that.

youdao

很明显地，当我必须把所有的东西都写在黑板上，我会变得更慢，因此他们才有很多时间来跟上进度。

Obviously, when I have to write everything on the board, I go more slowly, so they get a lot of time to follow the whole thing.

youdao

很明显地，当我必须把所有的东西都写在黑板上，我会变得更慢，因此他们才有很多时间来跟上进度。

Obviously, when I have to write everything on the board, I go more slowly, so they get a lot of time to follow the whole thing.

youdao