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The second is to ensure high-quality online live learning effect and experience, so the technical research and development requirements for online platforms will be higher and higher.Liu Guiduo has been sticking to his guns and denied all the charges.　　退休后无所事事的父亲（陈佩斯饰），与待业在家的儿子（陈大愚饰）过着相依为命的生活。父亲酷爱唱歌，却五音不全，儿子热爱打鼓，却遇不上伯乐。俩人互相厌烦着对方制造的噪音，经常擦枪走火。父亲一次无意滥用了儿子珍视的鼓槌，积压已久的矛盾终于爆发…离家、冷战，儿子楼顶支起帐篷，但不久变成了抗风的彩钢房；父亲不小心“煮多”的面条，还特意多加了两个鸡蛋；儿子一边挖苦一边留下润喉雪梨；崭新的鼓槌、贴心的耳塞…看似恶言相向的两人，其实一直在背后默默支持着彼此的热爱。两代人的矛盾终于在一场惊喜的演出中，得到和解。板栗跟葫芦异口同声地叫道：这话说的是。她好后悔……春花消失，那军汉浑然不知，兀自惊叹不已，又弯腰对一只巨大的乌龟仔细地端详，说比知府大人带走的那个还要大。For easier management, We can also create custom chains in a table, Place the rules set for an application in this custom chain, But custom links cannot be used directly, It can only work if it is called as an action by a default chain. We can imagine that, Custom chain is a relatively "short" chain. The rules on this "short" chain are all formulated for an application program. However, this short chain cannot be directly used, but needs to be "welded" on the default definition chain of IPTables before it can be used by IPTables. This is why the default definition "chain" needs to refer to "custom chain" as "action". This is a later remark. We will talk about it later. We can understand it more clearly in actual use.