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
Middle English: from Old Norse und 'as far as' + till (the sense thus duplicated)
用法
On the differences between until and till, see usage at till