但是，它有一个很主要的缺点：那就是我们的头发常常会破坏它应有的的效果。

But it has a major drawback: it's usually impaired by hair.

youdao

作为训练，它有一个严重的缺点，因为它没有给我规定成功的标准。

And regarded as training, it had one grave defect; for it set me no standards of achievement.

youdao

作为训练，它有一个严重的缺点，这就是它没有规定写好写坏的标准。

And regarded as training, it had one grave defect; for it set me no standards of achievement.

youdao

作为训练，它有一个严重的缺点，这就是它没有规定写好写坏的标准。

And regarded as training, it had one grave defect; for it set me no standards of achievement.

youdao