Under natural conditions, a Giant Salamander may live for decades.

在自然条件下一只大鲵可以活几十岁。

Most ancient people thought of slavery as a natural condition that could happen to anyone at any time.

古代的大多数人认为，奴隶制是自然产生的，可能在任何时候，任何人身上发生。

They easily break down in natural conditions.

它们很容易在自然条件下分解。

You could say that man had begun to break away from his natural condition.

可以说，人已经开始脱离他的天然状态。

In fact it's the only place we know of in our entire Solar System where plants and animals can live under natural conditions.

事实上太阳系中只有这个位置适合动植物的生存。

In a sense, displacement was not unusual for him; it was the natural condition of a poet, the outsider, critically observing the world and distanced from its norms.

从某种意义上说，四处漂泊对他来说并不罕见；这是诗人常见的状态，他们作为一个局外人，批判地观察这个世界，远离既定的规章制度。

The serious threat to the environment we are facing today has made many people see the technical revolution itself as a perilous maladjustment to natural conditions.

我们今天面临的环境面临的严重威胁使许多人将技术革命本身视为对自然条件的危险失调。

Similar cases occurring with insects under natural conditions have lately been discussed with much ability by Mr. Walsh, who has grouped them under his law of equable variability.

沃尔什先生最近对自然条件下发生在昆虫身上的类似情况进行了非常有能力的讨论， 他根据他的等变性法则对它们进行了分组。

I have more than once alluded to a large body of facts showing that, when animals and plants are removed from their natural conditions, they are extremely liable to have their reproductive systems seriously affected.

我不止一次提到大量事实表明，当动植物脱离其自然条件时，它们的生殖系统极易受到严重影响。

But as species are more variable when domesticated or cultivated than under their natural conditions, it is not probable that such great and abrupt variations have often occurred under nature, as are known occasionally to arise under domestication.

但是，由于物种在驯化或栽培时比在自然条件下变化更大，因此在自然条件下不可能经常发生如此巨大和突然的变化， 而众所周知在驯化条件下偶尔会发生这种变化。