尚未确定

The date of his departure is uncertain.

离开的日期尚未确定。

The date's not fixed yet.

日期尚未确定。

The Bisu people of Lancang have been identified as the Lahu people in 1990.However, the Bisu people of Menghai have not been identified its ethnic genera yet.

澜沧等地的毕苏人经过识别，已于1990年归入拉祜，勐海的毕苏人则尚未确定属。

Mussa Aboud Jumbe, Zanzibar's director of fisheries, went on state radio to warn the public against eating the dolphin meat, saying the cause of death had not been determined.

当地渔业部门的负责人在广播中，告诫人们不要食用死亡海豚的肉，因为死亡原因尚未确定。