什么样的人才想花费他们的时间和精力去做一些不明确的事情？

What talented person wants to spend his or her time and energy in support of something undefined?

这项政策的长远影响尚不明确。

The long-term impact of this policy is not yet clear.

这种政策的长期效应尚不明确。

The long-term effect of this policy is still unclear.

不明确的目标会使整个团队失去动力。

Unclear goals can demotivate the entire team.

这个词“西拉”的确切含义仍然不明确。

The exact meaning of the word selah is still unclear.

政策不明确，自相矛盾。

The policy is unclear and contradictory.

不明确的茫然凝视成了常态。

A non-committal blank stare became the norm.

其其余计划尚不明确。

Its other plans are less specific.

最后一段表达得不明确.

The last paragraph is ambiguously phrased.

但是病变的机制仍不明确。

The mechanisms underlying this disorder however remain unknown.