The State-owned space contractor said that the Yaogan 34-02 satellite was placed in a preset orbit aboard a Long March 4C rocket that lifted off at 3:09 pm.
请问这里的abroad是作介词吗?
这个词比较特殊,可同时作介词或副词用。但在你的句子中,看作介词较妥,因为构成介词短语。请看《剑桥词典》释义:
https://dictionary.cambridge.org/dictionary/english/aboard
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