次品

这批电子产品中有百分之五是次品，必须把这些次品全部退回工厂。

Zhè pī diànzǐ chǎnpǐn zhōng yǒu bǎi fēn zhī wǔ shì cìpǐn, bìxū bǎ zhèxiē cìpǐn quánbù tuìhuí gōngchǎng.

Five percent of this batch of electronic products are defective; all of those defective items must be returned to the factory.