undated

1.a classic, undated dress.

古典而始终流衣服

2.an undated letter; an undated portrait.

未写日信；未标日画家

3.An 80-ton remote control fish feeder, designed to survive even a destructive nor'easter, floats off the coast of New Hampshire in an undated picture.

这张未标明日照片主角，是漂浮在美国新罕布什尔州海岸附近、重达80吨群喂养装置。