这个聊天群里有几百个潜水员只看消息从不发言。

There are hundreds of ___lurkers in this group chat who only read messages without replying.

警察在灌木丛中发现了几个潜伏者，他们似乎正在监视这栋房子。

The police found several ___lurkers in the bushes, apparently watching the house.