每个（户外厕所）都必须有四个面、一个马桶座圈和卫生纸。

Each must have four sides, a toilet seat and toilet paper.

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例如，自研究开始，高架马桶座圈的使用增加了一倍以上，而浴缸座圈的使用增加了50%以上。

For instance, the use of raised toilet seats has more than doubled since the start of the study, and the use of bath seats has grown by more than 50%.

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可以用它修补漏水的马桶，修理马桶座圈的裂缝。

You can use it repair a leaky toilet, or to fix a crack on a toilet seat.

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