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This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows:影が重なる時 八嶋智人 桜井幸子杨长帆看着沈悯芮惊讶的神色补充道，别问我为什么，我也不知道。The People's Court approved the death sentences handed down by the Guangdong Provincial Higher People's Court to 13 murderers, including Weng Siliang and Sony Wei, who robbed Hong Kong's "Changsheng" round, and issued orders to execute the death penalty. The 13 criminals fell in court in Shanwei, Guangdong.说笑间，众人就定下了清南村中秋少年赛船。马克思（凯登·博伊德饰）像大部分同年龄的小朋友一样，心事重重，父母的管教、繁重的功课、没有朋友，生活别提多么不如意了。而且，这整个无聊的夏天他都将孤独度过，未来显得黯淡无比。喜欢漫画的马克思决定创造一本属于自己的历险记，在里面他大显神勇，还和自己最喜欢的漫画角色鲨鱼男孩、火山女孩一起探险。