Exceeding what is needed; superabundant.

过多的；多余的。

In writing or speaking, too full or too wordy; unnecessary to the sense; superfluous.

赘语繁文的；累赘的；冗长的。

Serving as a duplicate for preventing failure of an entire system upon failure of a single component.

备用的装备(为防范因一个零件失效时影响整个系统而增设)。