你的第二个任务是，回想当初学习造句的过程。

For your second mission, think back to learning to form sentences.

youdao

也许在学期初学习矩阵的时侯,我们并没有充分的强调它。

So, that's one thing that maybe we didn't emphasize enough when we did matrices at the beginning of a semester.

youdao

鸟类起初学习分行是从地面开始的，而不是在树林间盘旋。

Birds first flew by taking off from the ground, not gliding between trees.

youdao