直到1906年，一位学者才在图书馆偶然发现了这本祈祷书，并意识到它是一本重写本，而且底层的文本只可能出自阿基米德之手。

It wasn't until 1906 that a scholar came across the prayer book in a library and realized it was a palimpsest, and that the underlying layer of texts could only have come from Archimedes.

youdao

他为了同样的目的去了一个又一个地方，直到他赚够了钱买一本语法书。

He went to another place for the same purpose, and then to another, until he had earned enough to buy a grammar book.

youdao

作业数量尺度的不一致始终没有让我搞明白，直到我为写一本新书而开始筛选研究资料。

The dimensions of that last disparity weren’t clear to me until I began sifting through the research for a new book.

youdao