評(píng)論
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But some scientists had spotted a flaw in the climate change theory.
可是有些科學(xué)家卻指出了氣候變遷理論中的缺陷
Even if the climate had changed, it didn't follow that all the dinosaurs had to change as well.
即使氣候發(fā)生變化，那也不能說明恐龍必須發(fā)生改變
Climate is an important factor and it's one which obviously affected the dinosaurs in the middle Jurassic,
氣候是一個(gè)重要因素，它顯然影響了中侏羅世的恐龍
but it is not a single factor that could have done it alone,
但是光憑一個(gè)因素并不能達(dá)到這類結(jié)果
for the simple reason dinosaurs, if the climate changed became terrible, they would up sticks and move.
原因很簡(jiǎn)單，如果氣候?qū)铸垇碚f變得相當(dāng)惡劣，它們就會(huì)動(dòng)身遷徙
If the dinosaurs could move
如果恐龍可以遷徙
they could simply go wherever they wanted to find the climate and vegetation they liked best.
那么它們就能走到任何地方，去尋找它們最喜歡的氣候和植被
On its own climate change wasn't enough to explain the transformation of the dinosaurs in the mid-Jurassic.
就這點(diǎn)而言，氣候變化并不足以解釋中侏羅世恐龍的轉(zhuǎn)變
For climate change to have become a major evolutionary force, it needed something else, a physical barrier.
氣候變化若想成為強(qiáng)大的進(jìn)化動(dòng)力，它還需要?jiǎng)e的東西，自然屏障。
If the dinosaurs were forced to stay put, they would have to evolve to suit the changed conditions, or die.
如果恐龍被迫滯留，它們就必須進(jìn)化以適應(yīng)環(huán)境變化，否則就會(huì)滅絕
Movement is the key 'cos if you actually do break the movement across the continent
遷徙是關(guān)鍵，如果阻斷大陸間的遷徙過程
you bring up a barrier, whether it be waters or mountains,
設(shè)置屏障，不管是水還是山脈
and you actually restrict that group and the climate does continue to change.
那就能限定這塊地界，氣候也能繼續(xù)改變
That's when you will start affecting these populations of animals.
那時(shí)對(duì)動(dòng)物群落的影響才真正開始。
