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Policy pattern refers to defining a series of algorithms and encapsulating them. However, policy pattern not only encapsulates algorithms, but also encapsulates a series of business rules. As long as these business rules have the same objectives, we can use policy pattern to encapsulate them.本剧讲述了1850年代淘金热期间，华裔澳大利亚人不为人知的经历。故事以真实事件为灵感，发生在1957年澳大利亚维多利亚州的巴拉瑞特。在那里，欧洲人、中国人和澳洲原住民（包含澳大利亚土著人和托雷斯海峡岛民）共同生活在一个西部边陲的小镇上，他们试图通过淘金致富。一名白人女性在此地遭 到谋杀，对凶手的追捕在不同群体间掀起了轩然大波。天渐渐黑下来，当完全入夜之时，最后的燃烧也就此结束，占据下风口的西班牙战舰，没有一艘成功逃离。Explosive mushroom ghost drug岂止是晦气死了，那可就大乱了。Green 105% +5%But in that case, Not even considering so many dangers, This performance of '74 spray' is of great use, I remember there were 4 '74 spray' on the position at that time, There are two recruits who operate them. Two veterans, Both veterans were squad leaders, All have the skills of air injection, Facing the big wasp descending from the pavement, The two of them were obviously forced to hurry, Take up the '74 spray' and aim at the position where the big wasp is relatively concentrated in the sky and spray it out. If it weren't for the critical situation at that time, the two squad leaders would definitely not have this kind of "dangerous operation", while the other two recruits watched the veterans take the lead and learned to do so. Although they had not received relevant training and the accuracy of spraying was not as good as that of veterans, they finally sprayed out and did not hurt themselves or other comrades in arms.