But yesterday, a top Navy officer said that though the calls are being analyzed, officials don`t have, quote, clear evidence they came from the San Juan.

但是昨天，一位高官员说尽管那些电话信号经过仔细的分析，官方仍然不能确定是圣胡安号发出的。

You pack your truck, you hire a team, you get to your stall, but you have no guarantees that you're going to move your product that day.

你要装好卡车，雇用团队，到了摊位，但你还是不能确定天能不能把产品卖出去。

Wow, so not sure whether he's a mythical character or a real character.

哇，所以你不能确定他是神话人物还是实存在的人物。

But Naomi Kikoler and other anti-genocide advocates are not so sure.

但是娜奥米·基可勒和其他反种族灭绝倡导者不能确定这种说法。

They're not certain how contagious people are when they get it.

有人感染时，他们也不能确定这些感染者的传染性有多强。

Because people there don't know where the oil's coming from, they can't say for sure whether the spill is getting worse or better.

由于地人们不知道这些原油到底来自何处，他们不能确定这次泄漏的情况是否好转。

So while there's hope that Canada will join in, it's not a done deal.

因此，尽管加拿大仍有望加入该协议，情况仍不能确定。

I've been treating it for a long time and I still can't 100 percent tell when someone is anxious. Nor can I tell what is making them anxious.

即便我已在该领域深耕多年，但现在还是做不到能有100%把握确诊焦虑症，也不能完确定诱因。

Now, we can't be sure this means they're more intelligent, but since the sizes of other parts of the body didn't change, it does suggest that something cognitive was going on.

我们不能确定这就意味着它们变得更加聪明，但是因为身体的其他部分大小并没有改变，这确实能够暗示着发生了一些认知方面的变化。

And I’m not always sure how much of a certain thing is bad.

而且我总是不能确定某些成分的含量达到多少是不健康的。

It's possible but not certain that they were mixed with other chemicals.

有可能，但不能确定它们是否与其他化学物质混合。

You may know what they mean but you'll hear them, and that's extremely important, because if you can't identify something, you can't ask anyone to explain it to you, right? Cool.

你可能理解他们的意思，但你会听清楚每个词，这点超重要，因为如果你不能确定一件事，你不能问别人如何解释，对吧？cool！

We can't confirm that the moose had any impact on the game, though he would have scored himself if he hadn't stepped out of bounds.

我们不能确定这只驼鹿对比赛有任何影响，但如果它没有越界的话，它自己就会得分。

And even though the various non-theatrical cuts of the film heavily imply that Deckard's memories are implants, we're never told for sure.

而且，尽管有一些片段暗示Decakrd的记忆是植入的，我们仍然不能确定。

But I can't be sure that that is true.

但我不能确定这是的。

Major League Baseball's commissioner says virtually all of the Astros players had some knowledge or involvement in the scheme, but that he couldn't determine how much each player knew.

职业棒球大联盟的专员表示，几乎所有的太空人队球员都知道或参与了这个计划，但不能确定每个球员都知道多少。

Harvard's provost says, by the fall the school cannot be certain that it will be safe to resume all usual activities on campus.

哈佛校方表示，在秋季学期之前，学校还不能确定恢复正常教学活动是否安。

The groups that we saw we`re not sure which rebel group they were from and also, we`re not sure where they were being taken.

我们看到的那些团体，我们并不能确定他们来自哪个叛组织，也不确定他们被带到哪里。

Still not convinced? Get this, cat owner's are proven to be smarter than dog owners in both overall intelligence and level of education.

还不能确定吗？瞧瞧这个，已经证明养猫的人比养狗的更聪明，不仅在智方面，还包括受教育程度。

Mangers can't say for sure when their next shipments will arrive, and critics say the U.S. government's efforts to try to get things moving aren't enough.

经理们不能确定他们的下一批货什么时候能到，批评人士表示，美国政府试图推动事态发展的努还不够。