on call
介词短语
英文释义
介词短语
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Available to be summoned.
— 1984-1986, Lou Sullivan, personal diary, quoted in 2019, Ellis Martin, Zach Ozma (editors), We Both Laughed In Pleasure Know I cannot rely on him to do anything for me while recovering from my surgery. But Bridget & Maryellen are very willing to be on-call for me and even Jim/Kathleen are offering their place for me to come over.
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数据来源: Wiktionary