额外的假设对主要论证来说是多余的。

The extra assumptions are ___superfluous to the main argument.

这些额外的装饰在简约风格的房间里显得多余。

These extra decorations appear ___superfluous in the minimalist room.

这些额外的说明其实是多余的，简单几句话就能解释清楚。

These additional explanations are actually ___superfluous; just a few simple sentences would suffice.