1 to test a shuttle , use a full underhand stroke which makes contact with the shuttle over the back boundary line 測(cè)試一個(gè)羽毛球,采用低手擊球使得羽毛球超過(guò)后界。
Extension of the court by l 1 2 feet on both sides for doubles play . area between the back boundary line and the long service line for doubles 單打與雙打界線間空地網(wǎng)球場(chǎng)邊的平行狹長(zhǎng)地帶,加寬了界內(nèi)場(chǎng)地,可進(jìn)行雙打比賽