大单小单大双小双口诀简介：The uncle of the security room was taking a nap on a sleepy summer afternoon, lying on a big rocking chair, with his feet crossed in a sloppy posture, hanging on the desk.
The uncle of the security room was taking a nap on a sleepy summer afternoon, lying on a big rocking chair, with his feet crossed in a sloppy posture, hanging on the desk.
