An outdated distinction between two types of oil muds.

两种油基泥浆的一种已经过时的区分方法。

The dawn of commercial profit-making MUDs in not far away.

商业性的、能够产生利润的MUD的黎明已经不远了。

Synthetic liquids are now being substituted for oils in emulsion muds.

目前乳化泥浆用合成液体代替了油滴。

The kids, who had played MUDs before, were particularly crazy about it.

特别是那些玩过MUD的同学们，简直是着了迷！

Also in development are new drilling muds that cool the drill bit during operation.

新的钻探泥浆(用于在操作时冷却钻头)也在开发中。