// 当前元素入栈：成为「左侧元素」的候选更大值（易错点4：别漏写这一步）
When they are being manufactured in a weightless environment, those atoms line up absolutely perfectly. The vacuum of space also means that contaminants can't sneak in.
，这一点在heLLoword翻译官方下载中也有详细论述
Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
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