CSC曾是全球领先的IT服务提供商之一。

___CSC was one of the leading global IT service providers.

计算这个三角形的边长时，别忘了先求出角度的余割值。

When calculating the side lengths of this triangle, remember to find the ___csc of the angle first.

CSC正在招募新球员。

The ___CSC is recruiting new players.