The scenarios used in the command mode include: sometimes it is necessary to send a request to some objects, but I don't know who the recipient of the request is or what the operation of the request is. At this time, I hope to design the program code in a loosely coupled way; So that the request sender and the request receiver eliminate the coupling relationship in each other's codes.The basic idea is the same as the adapter pattern of the class, except that the Adapter class is modified. This time, instead of inheriting the Source class, an instance of the Source class is held to solve the compatibility problem. Look at the picture:他喃喃失声道。二十年前一宗手术,令两名儿科专科实习医生况丛昕（马国明饰）与许甘枫（郑嘉颖饰）决裂。时日过去,丛昕当上顶尖医院安妮医院的小儿外科顾问医生,而一心捍卫生命的甘枫却于一间二线医院落脚,两人本来各走各路,岂料因一宗肝移植手术而再次碰头,命运亦从此连上。丛昕施计逼令甘枫加入安妮医院,再找上昔日战友心胸肺外科医生章以芯（锺嘉欣饰）,外科主管麦海琪（周家怡饰）打造出一支完美团队,目的只为拼凑心中蓝图,为兴建香港第一所儿科中心铺路。经历一个个病童的生死故事,令原本势成水火的丛昕与甘枫逐渐解开心结。此时,专科医生文柏熙（罗子溢饰）与专科实习医生连卓盈（张宝儿饰）竟发现二十年前的手术竟牵涉一个重大医疗失误,而当中的主刀就是安妮医院附属的东亚大学医学院院长锺怀霜（龚慈恩饰）,众人决定将真相揭开……Infrared circuit part
