这片古老森林仍未受到人类开发的影响。

The ancient forest remains ___untouched by human development.

这个偏远山谷仍未被现代技术触及。

The remote valley is still ___untouched by modern technology.

这份历史手稿在档案室中未被触动。

The historical manuscript was left ___untouched in the archive.