When the water level drops, the main valve is composed of a floating ball switch control to open the water inlet to the water tank, automatic replenishment.

当水位下降后，主阀由浮球开关控制打开进水口向水池汪水，实现自动补水。

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They play eight-man ball, although if a bigger school comes to town they switch numbers with every possession, so that each side can practice its plays.

他们按八人制的规则打球，如果来镇上比赛的学校人比较多，他们就会在每次控球权转换时调整人数，这样双方都能按自己习惯的规则打球。

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And while it wouldn't be difficult to get the ball rolling on this, it would be difficult to convince other content providers to abandon Apple and to switch to Sony's content platform instead.

索尼从苹果公司撤出自己的内容不难，要想说服其他内容提供商放弃苹果而转投索尼旗下的内容平台，非常困难。

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Kamara's corner from the right corner found Loovens in the heart of the penalty box and the Dutchman mis-controlled it, but still managed to switch the ball from right foot to left and clinically finish.

BBC: Glenn Lovvens scores Celtic's opener

The boys just flicked that switch with the ball in hand and I think there is loads more to come from this team.

BBC: England can offer more - Johnson

Although it's early to start calling them out, if Blu-ray doesn't ever release 50GB discs or if the CE companies and studios switch sides we have a whole new ball game.

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