ball return spring 阀球返回弹簧
a ball-return track 回珠滚道
worm ball return guide 蜗杆球回行导架
worm ball return guide clamp 蜗杆球导管夹
ball non-return valve 球形止回阀 ; 单向球阀 ; 球形止逆阀
ball return channel 圆珠通道
non-return ball bearing 止推滚珠轴承
A professional tennis player just "knows" how to return a ball with a topspin.
一个专业的网球选手“知道”如何回一个上旋球。
After Lampard had sent a free-kick into the wall Joachim low's side raced away, with muller finding Schweinsteiger on the left and converting the eventual return ball at the far post.
兰帕德将任意球踢在人墙上，勒夫的球队迅速展开，穆勒用传球找到左路的施魏因斯泰格，随后接应后者的回传在远点将球打进。
I saw your golden ball fall into the water, and it will be my pleasure to dive down and get it for you, if you will give me something in return.
要是我帮您把您的金球捞出来，您拿什么东西来回报我呢？
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