So, I used to knock sponge balls off the wall till my mum got fed upwith it and got us a Swingball for the back garden.

那么，我过去经常对着墙打海绵球，直到我妈不耐烦了，给我们弄来了摇摆球，放在后院里。

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The paper is aimed to clean the fouled tubular membrane with rubber sponge balls in order to solve the problem which is not able to do with some traditional cleaning methods.

本课题的目的在于用海绵橡胶球对污染的管式膜进行清洗，以解决一些传统的清洗方法所不能解决的问题。

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I started outside to play game, and from there I moved on to play mini tennis with small rackets and big sponge balls. After that then I moved on to play tennis in tennis clubs.

我从这儿起步，然后我开始打迷你网球，用小球拍和大的海绵网球，之后我在一家网球俱乐部打网球。

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