又或是你用双手我还是只是用单手呢？
自合伞在开伞时用双手撑开，合伞时用单手就可使伞合拢。
The hands are used for opening the umbrella at the time of opening, and one hand is used for closing the umbrella at the time of closing.
对于用单手反手击球的人来说，你会发现你的步法需要稳定。
For those of you who hit with one hand on the backhand, you find your footwork need to be consistent.
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