The two waiters inside the cafe knew that the old man was a little drunk, and while he was a good client they knew that if he ame too drunk he would leave without paying, so they kept watch on him.

• 呆在餐馆里的两个侍者知道这老人有点儿醉了，他虽然是个好主顾，可是，他们知道，如果他喝得太醉了，他会不付账就走，所以他们一直在留神他。