模仿句子：This kind of contractual clause on selection is absolutely normal if Barcelona agree to a friendly, it'll be one fee of Messi pays and another fee if he doesn't.

翻译：如果巴萨同意打友谊赛的话，在选拔过程中存在这种契约性条款是完全正常的，梅西上场是一个价，不上场又是一个价。