knock at

  1. 打, 捶, 敲
    • He went upstairs and knocked at the door.
      他上楼敲门。
    • Opportunity knocks at the door only once.
      机不可失, 时不再来。

网络词典

knock at

英 Unknown 美 Unknown
Unknown 中文翻译:Unknown
同义词: Unknown

例句: