所有的战士都必须佩戴袖章。

All the soldiers must pin their armbands on.

所以，那时候我们就计划了戴袖章上学这件小事。

So then we just planned this little thing of wearing these armbands to school.

我们戴袖章的前一天，这件事不知怎么在我的代数课上被提起来。

The day before we were going to wear the armbands it came up somehow in my algebra class.