first name的反义词有：family, name, surname, last, name。n.first name的反义词（名）：family, name, surname。first name的反义词（其他释义）：last, name。...

headfirst的近义词/同义词有：carelessly, impulsively, impetuously, hastily, rashly, recklessly, headlong。adv.headfirst的近义词（匆忙地;贸然地）：carelessly, impulsively, impetuously, hastily, rashly, recklessly。headfirst的近义词（其他释义）：headlong。...

It’s not firsthand information.那不是第一手资料。I learned the news about her mother's illness firsthand from Lena.我直接从丽娜那里了解到她母亲生病的消息.School trips give children firsthand experience not available in the classroom.学校组织的出游能让孩...