In the past, this was a very exceptional case.

过去，这种情况极为罕见。

" And in exceptional cases we can make one ovary yield us over fifteen thousand adult individuals."

“在特殊的例外情况下我们可以用一个卵子培养出一万五千个成年人。”

It's counter-intuitive for opposition parties to refuse an election. But in this exceptional case, it's vital they do so.

反对党一般不会拒绝选举，但在这种特殊情况下，他们这样做是至关重要的。

" This, I think, is an exceptional case" .

“我认为，这是一个特例”。

But these are exceptional cases and the result of intense collaboration with humans.

但这些都是特殊情况，是与人类密切合作的结果。

But I should point out that those deaths are absolutely exceptional cases and are perfect evidence that students need more such training.

但我应该指出，这些死亡绝对是例外情况，是学生需要更多此类培训的完美证据。

Thus the certainty of our knowledge of our own experiences does not have to be limited in any way to allow for exceptional cases.

因此，我们对自己经验的知识的确定性不必以任何方式限制以允许例外情况。

What makes a belief true is a fact, and this fact does not (except in exceptional cases) in any way involve the mind of the person who has the belief.

使信念为真的是事实，而这个事实（除了特殊情况）不会以任何方式涉及拥有信念的人的思想。

But, in exceptional cases, beautiful lawns formed with great deliberation are overwhelmed and obliterated at once by the action of land-slips, earthquake avalanches, or extraordinary floods, just as lakes are.

但是，在特殊情况下，经过深思熟虑形成的美丽草坪会立即被山体滑坡、地震雪崩或特大洪水淹没和摧毁，就像湖泊一样。

In 1876 it was estimated that there were between 15,000 and 20,000 hives in the county, producing an annual yield of about 100 pounds to the hive-in some exceptional cases, a much greater yield.

1876 年，据估计该县有 15,000 到 20,000 个蜂箱，蜂箱的年产量约为 100 磅——在某些特殊情况下，产量要高得多。

I am far from meaning that this is invariably the case, and I could give several exceptional cases of variations (taking the word in the largest sense) which have supervened at an earlier age in the child than in the parent.

我并不是说情况总是如此，我可以举出几个例外的变异案例（从最大意义上使用这个词）， 这些变异在孩子身上发生的时间比在父母身上发生的时间早。