antediluvian

My grandfather still uses an antediluvian rotary phone that weighs five pounds.

(Chinese) 我祖父仍在使用一部重达五磅、极其古老的拨号电话。

To the young students, the teacher's ideas about dress codes seemed positively antediluvian.

(Chinese) 在年轻学生看来，老师关于着装规范的想法简直是老掉牙了。