这种颜料中添加了炭黑以增强其遮盖力。

This pigment contains ___CB to improve its opacity.

我们开车旅行时用民用波段无线电保持联系。

We use ___CB radios to stay in touch during our road trips.

我们的队长在比赛中担任中后卫，负责组织防线。

Our captain plays as the ___CB in the match, organizing the defensive line.