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在双打中，常常能够看到高手们打出高速度的球从两人中间穿越而过，使本方士气一下子大振起来，那么怎样才能够打出高速度的球呢?
In doubles, you can often see the high-handed players play high-speed ball through the middle of the two, so that the morale of the party suddenly shook up, then how can we hit a high-speed ball it?