hitherto

The researchers discovered species of fish hitherto unknown to science.

(Chinese) 研究人员发现了迄今为止科学界尚未知晓的鱼类物种。

The quiet village was hitherto undisturbed by modern industry.

(Chinese) 这座宁静的村庄在此之前一直未受到现代工业的打扰。