На помощь российским туристам на Ближнем Востоке ушли миллиарды рублей20:47
What is Connections?The NYT's latest daily word game has become a social media hit. The Times credits associate puzzle editor Wyna Liu with helping to create the new word game and bringing it to the publications' Games section. Connections can be played on both web browsers and mobile devices and require players to group four words that share something in common.
，这一点在爱思助手下载最新版本中也有详细论述
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* @param mid 中间位置（左子数组结束位置）
Introduction to events: event propagation — MDN Web Docs