Lawn-tennis balls

The Obamas can also play tennis on a court on the South Lawn, hit a few golf balls on the putting greens or run around the jogging track.

在南侧的草坪上奥巴马一家还可以打网球，打几杆高尔夫练习球洞或是绕着操场慢跑。

Lawn tennis to give the sport its full title developed from real tennis an indoor game that dates back to twelfth or thirteenth-century France when balls were hit with the palm of the hand.

这项全名为草地网球的运动，源自十二、十三世纪法国的“宫廷网球”。当时还是室内游戏，玩者徒手以掌心击球。

Lawn tennis, to give the sport its full title, developed from real tennis, an indoor game that dates back to twelfth or thirteenth-century France, when balls were hit with the palm of the hand.

这项全名为草地网球的运动，源自十二、十三世纪法国的“宫廷网球”。当时还是室内游戏，玩者徒手以掌心击球。