请问top to bottom在句中是什么意思?

问题描述:

请问top to bottom在句中是什么意思?
1.Fold the paper in half(top to bottom.
2.Fold the paper in the same direction as the centre fold line.

1.将这张纸从上到下对折起来.
2.将这张纸沿着对折中心线向同一个方向折起来.