他低头发现咖啡渍沾在了衬衫前襟上。

He looked down and saw coffee stains on his ___shirtfront.

他的正装衬衫配有一个可拆卸的假前胸，方便更换。

His dress shirt comes with a detachable ___shirtfront for easy replacement.

裁判因球员在场上鲁莽的正面冲撞而出示黄牌。

The referee gave a yellow card for a reckless ___shirt-front on the field.