But its exact age and place on the evolutionary tree are not clear.

但其确切年龄和在进化树上的位置尚不清楚。

The baby would just be the exact same age it was when it disappeared.

婴儿会和它消失时的年龄完全相同。

Conner is in his 70s, but the company did not provide his exact age.

康纳已经70多岁了，但公司没有提及他的确切年龄。

But, the study noted, carbon dating of the comb failed to show its exact age.

但是，该研究指出，对梳子的碳年代测定未能表明其确切年份。

The mummies had long been in Swansea's collection. Experts are not sure of their exact age.

这些木乃伊长期被斯旺西收藏。专家们无法确定它们的确切年龄。

As you can see, there is no exact age or moment in development that we can point to.

如你所见，我们无法确定发育过程中的哪个确切年龄或节点才算成年。

Pinning down the exact age of the rocks is tricky, though.

不过，确定岩石的确切年龄并不容易。

So when you don't know the exact age of someone, you can use that term.

所以当你不知道某人的确切年龄时，你可以使用那个词。

As you can see, there's no exact age or moment in development that we can point to.

正如您所看到的，我们没有可以指出的确切年龄或发育时刻。

When you don't know someone's exact age, but you think they're in their twenties or thirties or forties, you can use this expression.

当你不知道某人的确切年龄，但你认为他们在二、三、四十岁时， 你可以使用这个表达方式。

Now, in a new study, scientists have pinpointed the exact age at which your chances of reaching fluency in a second language seem to plummet: 10.

现在，科学家们在一项新的研究中精确地指出了二语习得时，你有机会达到流利水平的确切年龄分水岭：10岁。

This is also why many history books are fuzzy about her exact age and date of birth, because there are so many conflicting stories of exactly what happened.

这也是为什么许多历史书中对她的确切年龄和出生日期写得都很模糊，因为关于到底发生了什么有太多矛盾的说法。

It is possible that in catching one young, I had picked from too early a litter. No one knew her exact age, but it was somewhere between ten and twelve. At any rate, Georgia was unteachable.

有可能在抓幼仔时，我从一窝太早的幼崽中挑选出来。没有人知道她的确切年龄，但大约在 10 到 12 岁之间。无论如何，格鲁吉亚是不可教​​的。