不幸的是，这种情况似乎并未出现。

Unfortunately this does not seem to be happening.

youdao

这样的迹象并未出现。

There is no sign of this.

youdao

圆顶城市和会飞的汽车并未出现。

The domed cities and flying cars we expected have failed to materialize.

youdao

Some of them get reinforced and those are the ones that survive and others don't get reinforced and those are the ones that go extinct.

一些行为得到了强化，因而保存了下来,另一些行为则并未得到强化,不再出现。

耶鲁公开课 - 心理学导论课程节选

Aristotle does not rule out the possibility of such a person emerging a person of what he calls excessive virtue almost hyperbolic excellence he says who stands so far above the rest as to deserve to be the natural ruler overall.

亚里士多德并未排除,这种人出现的可能性，一位他认为,具有过多美德，及几近夸张的卓越特质,他说，能持续凌驾众人之上的人,值得成为全面性的自然统治者。

耶鲁公开课 - 政治哲学导论课程节选