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生活自理能力比知识储备更重要：能自己上厕所、吃饭、表达需求，是入园最坚实的底气。
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"It's much more likely that you win the lottery than that you get impacted by this piece of space debris," Stijn Lemmens, a senior analyst at the European Space Agency, said.
广告化的囚徒困境：商家竞价的内耗循环