The date of the ship's arrival is uncertain.

船到的日期未定。

《新英汉大辞典》

That suit was thrown out by Greece's highest court, and construction on the museum is continuing, though a new completion date remains uncertain.

此项诉讼由希腊最高法院庭审，尽管一个新的完工期限还没有确定，但是该博物馆的建造仍在继续。

youdao

His date of birth is uncertain (around 1489).

他的出生日期是不确定的(约1489)。

youdao