make yourself comfortable 不用约束 （招待客人时说的话）；请随意；请不要拘束

【例句】
You are welcome. Please come in and make yourself comfortable.
欢迎，欢迎！请进来坐，不用拘束。

Make yourself comfortable and I'll be back in a minute.
请随意别客气，我一会儿就回来。