The observer mode defines a one-to-many dependency relationship, allowing multiple observer objects to monitor a certain topic object at the same time. When the state of this topic object changes, all observer objects will be notified so that they can automatically update their behaviors. The specific structure diagram is as follows:
这他知道西楚国虽然强大，项羽虽然狂霸。
新娘来了，她有很多话要说。新婚的伊丽莎·施莱辛格剖析婚礼习俗，深挖有关自己婚礼的笑料。
60% of the people have vague ideals and life goals.
绿萝这心里就更加的微妙奇特了。
罗先生那么难搞一人，徐经理一出手就把他搞定了。
Over The Storm -- M!LK
理浩的女儿患上了蚕豆症，这种带有遗传基因的病显示好友游尚志才是女儿的亲生父亲！这一真相的显现，令游尚志决定夺回自己的爱人与女儿，把理浩逼上绝路。
《守护生命的故事》是香港电视广播有限公司制作的健康节目。
杭州死牢，徐海端坐。
大苞谷满心疑惑：这可是他从一个西方来的洋人手上换来的，据说大靖还没有这东西。
The 19-year-old Huang Jinbo confessed first. He wanted to declare the circumstances of surrendering himself before the case became clear, but failed in the end.
LINUX: Linux uses the variable tcp_max_syn_backlog to define the maximum half number of connections that the backlog queue can hold. In Redhat 7.3, the value of this variable defaults to 256, which is far from enough. A low-intensity SYN attack can fill up the half-connection queue. We can modify the value of this variable with the following command:
Lois Lane对Lex的悔过自新仍抱着怀疑态度。在秘密军队对她的亲友造成巨大伤害后，Lois便发誓要击溃亿万富翁Lex。Lois的事业也蒸蒸日上，新上 任的星球日报主编Grant Gabriel (Michael Cassidy友情出演)非常赏识她积极的工作态度，并聘她为星球日报的明星记者。尽管在记者生涯上大展手脚，Lois却为自己抢了Chloe的风头而心 生愧疚。
本片是以古川饰演的华丽而高级的名门子弟·鸣户哲也（饰演彻也）为主人公的爱憎悬疑剧。描写了以妻子之位为目标的女性们的欲望和人类模样，以及围绕着爱展开的战斗的结果，杀死哲也的女性之谜。
……夏正一看自己是哪壶不开提哪壶，赶忙转移话题，这些功名，也不过是一场空。
A few days before the fall of Nanjing, the Japanese naval aviation sank the US warship Panai in the Yangtze River. The incident caused quite a stir in the United States and angered the whole country. As the "Panai" was carrying a group of photographers and cameramans, the incident was recorded by video and then produced into a documentary by MGM, which was screened in the United States. In order to prevent the anti-Japanese sentiment in the United States from getting out of control and forcing the U.S. Government to intervene in the war against Japan too early, President Roosevelt ordered the key parts of the film to be cut off so that the fact that the Japanese army deliberately attacked could not be revealed. Even so, the screening of the film has completely reversed the American people's perception of Japan. The public opinion foundation for the United States to support China's resistance to Japan has begun to take shape. The war between Japan and the United States began with Pearl Harbor attack. As for the prelude, many historians believe that when the Panai was sunk, it was already opened. Japan has always insisted on this matter as a mistake. However, Aban entered the curtain and was close to everyone at the top of the Japanese army to expose Japanese lies with first-hand personal experience. The "Panai" incident occurred in the Yangtze River of China and sank a few days before the Nanjing Massacre. It played an important catalytic role in the evolution of the triangular relations between China, Japan and the United States. There are new writings on this matter in the United States at the age of 18. However, the study of Chinese historiography has been completely silent and has remained blank so far. Interestingly, Matsumoto's "Shanghai Times" briefly mentioned the Nanjing Massacre and simply avoided talking about it. Perhaps because the incident involved the darkest scar of the Japanese army, it was really difficult to deal with it properly. Aban's book shows all aspects of the incident to Chinese readers. One is fresh, the other is in-depth and comprehensive, and the reading results are more than general. Of course, about the surging wind and cloud in the United States
When x=3, ViewGroup2 has already blocked the event when x=3. Why did MyView still receive an event? If the action value of this event received by MyView is printed out with log, it is found to be ACTION_CANCEL, which indicates that this event has ended for non-human reasons. Let me give an example of the ACTION_CANCEL event. Generally, when we handle the event, we will record something in the down event and then clear the record in the up event. If you have a Button in ListView, When we hold down the Button, the button receives the down event. At this moment, the finger starts to slide, and the event will be intercepted by ListView. At this time, the button will never receive the up event again. However, when ListView intercepts the event, the button will receive the cancel event, indicating that the event is ended for non-human reasons. Therefore, Cancel can do what the up event wants to do at this time.
