until

until
preposition& conjunction
  1. up to (the point in time or the event mentioned)
    直到…时,到…为止
    [as prep.]the kidnappers have given us until October 11th to deliver the documents.
    绑匪给我们定的递交文件最后期限是10月11日。
    he held the office until his death.
    他到死为止一直拥有这一职位。
    [as conjunction]you don't know what you can achieve until you try.
    尝试后才能知道自己能成就什么。
语源
  1. Middle English: from Old Norse und 'as far as' + till (the sense thus duplicated)
用法
  1. On the differences between until and till, see usage at till
英语宝典
考试词汇表