Unverified85% confidenceTradeoffTime unknown
氦气填充能让气球漂浮但氦气会在24-48小时内逐渐泄漏导致下沉,且家用氦气罐成本高;空气填充需配落地支架或吊挂,但可维持形态3-5天,室内固定布置优先空气填充
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85%
Confidence
Long-term
Relevance
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