so that they argue with you
Behold! when they meet the men of Faith, they say: "We believe": But when they meet each other in private, they say: "Shall you tell them what Allah hath revealed to you, that they may engage you in argument about it before your Lord?"- Do ye not understand (their aim)?
他们遇见信士们,就说:“我们已信道了。”他们彼此私下聚会的时候,他们却说:“你们把真主所启示你们的告诉他们,使他们将来得在主那里据此与你们争论吗?难道你们不了解吗?”