小花lily
frequent customer old customer usual 意思是 Usual is used to describe what happens or what is done most often in a particular situation. 更强调与事情经常发生, usual customer很少见, 不过usual customer care/service 倒是常用
MrStoneLiu
usualcustomer一般的客人（意思是每天都是这一个类型的客人。不特指）regularcustomer正常（一般）的客人（不是VIP也不是奇怪的客人，正常，一般）ordinarycustomer意思很接近 usualcustomer但不长用commoncustomer一般没有人这么说。
