stumbling across
美英
        - un.踌躇地转着;偶然发现;踌躇地转着;碰上
 
第三人称单数:stumbles across 现在分词:stumbling across 过去式:stumbled across
stumbling acrossstumbling across
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      第三人称单数:stumbles across 现在分词:stumbling across 过去式:stumbled across
stumbling across