So even if productivity is increasing—and that is not clear—on its own it is not enough.

即使生产力提高，那也不清楚增加的是否足够。

youdao

So even if productivity is increasing-and that is not clear-on its own it is not enough.

因此，即使是仅仅依靠提高生产率本身是不够的。

youdao

It is becoming increasingly clear that this problem will not be easily solved.

越来越明显的是，这个问题不会轻易解决。

《牛津词典》

It is not always clear that eating something as harmless as wheat can be bad for a person's health.

VOA: special.2010.06.15

Well you can read the story, it's in Numbers 20, the incident is described there. But the answer is still not entirely clear, it's not clear what Moses did that was so bad as to deserve this punishment.

你们可以阅读这个故事，在民数记20，讲述了这个事件,然而答案却仍然不是完全清楚的，摩西究竟做了什么,坏事才遭受这样的惩罚，还不完全清楚。

耶鲁公开课 - 旧约导论课程节选

He makes it clear that utility is the only standard of morality, in his view, so he's not challenging Bentham's premise. He's affirming it.

明确指出功利是道德的唯一标准，在他看来，他并没有质疑边沁的前提，而是肯定此观点。

耶鲁公开课 - 公正课程节选

Maybe a Chinese Wall restriction prohibits the sharing of such information, but that is not clear.

FORBES: Goldman Sachs Is Playing Both Sides Of The $8.5 Billion Bank Of America Settlement

Hopefully, that outcome would also prevent unnecessarily large changes in short-term interest rates, but that is not clear.

FORBES: The False Threat Of The Fed's Swollen Balance Sheet

Whether or not Mr Cabral has the stomach for that is not clear.

ECONOMIST: Brazil