In each packet there are batches of letters, most of which are undated.

每个包里都有成捆的信件，大部分都是未标注日期的。

《柯林斯英汉双解大词典》

Ever since the 1940s, vaccine makers have grown large batches of virus inside chicken eggs.

自20世纪40年代以来，疫苗制造商已经在鸡蛋中培养了大量的病毒。

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Ever since the 1940s, vaccine makers have grown large batches of virus inside chicken eggs.

自20世纪40年代以来，疫苗制造商已经在鸡蛋中培养了大量的病毒。

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Charge is quantized. In other words, it comes in batches of a certain unit.

电荷是量子化的，换句话说，它一批一批的以单位形式出现。

麻省理工公开课 - 固态化学导论课程节选

Twelve tested samples of different batches of meatballs showed no traces of horse meat.

BBC: Ikea store front

Investigators spoke to prisoners and hunted down the likely ingredients of various batches of pruno.

FORBES: Prisoners Making Hooch: What Could Possibly Go Wrong?

Eventually Mr. Freeman began hauling small batches of his roasted beans to a local farmer's market.

WSJ: Not the Same Old Grind: James Freeman of Blue Bottle | Creating