正常的大便可能有着不同的形状、大小、颜色。 但是只要你的大便不带血色、稀薄或要非常痛苦的用力，一般都是没问题的。

Normal feces comes in many different shapes, sizes, and colors, but as long as yours isn't bloody, loose, or painfully hard, you're probably okay.

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腹泻：一种大便稀薄的症状，因食物残渣异常迅速地通过大肠所致。发作时可伴以绞痛。

Diarrhea: Abnormally fast passage of waste material through the large intestine, resulting in frequent defecation with loose feces and sometimes cramps.

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