hitherto

相關句子：

1. In the execution of a computer program, to load a segment of the computer program in a storage area hitherto occupied by parts of the computer program that are not currently needed.
   在電腦程式執行中，把一個電腦程式段裝入在此以前被當前不需要的程式部分所占用的存儲器區域中。參閱formoverlay。
2. This is a fact hitherto unknown.
   這是一個至今無人知道的事實。

英文解釋：

副詞 hitherto:

1. used in negative statement to describe a situation that has existed up to this point or up to the present time
   同義詞：so far, thus far, up to now, heretofore, as yet, yet, til now, until now