indeterminate

这个分数在分母为零时会变成不定值。

The fraction becomes ___indeterminate when the denominator is zero.

会议结束的时间还未确定，可能会持续到很晚。

The end time of the meeting is still ___indeterminate and may go very late.

这个问题的答案仍然是不确定的，因为它涉及太多变量。

The answer to this question remains ___indeterminate as it involves too many variables.