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I think that with the majority of these therapod dinosaurs had display structures on their head.
我覺得這些獸腳類恐龍的大多數頭上都有展示結構。
They are probably related to identification of the animal, so that potential rival males can identify that there is a male who is going after your female, the ones you are interested in.
它們可能跟這些動物的辨認有關，這樣其潛在的雄性對手能知道有別的雄性在追求自己的雌性，自己中意的那些。
Or they can also tell the female that you are the right age and you are of interest.
或者也能用來告訴雌性自己年齡合適，對它有意思。
The extreme appearance of the Majungasaurus may also have been something to do with its environment.
瑪君龍的這些極端相貌也可能跟其所在的環境有關。
Any time we have a small population of animals isolated in a small area, you can't help but get inbreeding between family members.
任何時候一小群動物被分隔在一小塊地方，家庭成員之間進行近親繁殖就無可避免。
Over long periods of time and numerous generations, we start to see mutations caused by inbreed.
經過很長時間和無數世代之后，我們就能看到近親繁殖帶來的變異。
Now, in the case of Majungasaurus, so few skeletons have been found and we really don't know what normal look like for this particular species.
就瑪君龍來說，我們找到的骨骸太少，沒法確定這個物種一般的相貌如何。
But we can certainly suggest that because they lived on an island and it was separated from other similar dinosaurs, its ugly face could have been the end result of mutations.
不過我們肯定能推測因為它們住在一個小島上，而且它們跟其它類似的恐龍隔離了，它的丑臉有可能就是這種變異的最終結果。
The Majungasaurus was small compared to many of the dinosaurs of the Jurassic period, but it was still substantial.
瑪君龍體型要與侏羅紀時期的很多恐龍相比要小，不過仍很可觀。
Over three meters tall and eight and a half meters long, it weighed about a ton.
它高達三米長八米半，重約一噸。
On the tiny island of Madagascar, it was the biggest predator by far.
在馬達加斯加的小島上，它是到那時為止最大的掠食者。
Its jaw structure made it a particularly effective killer.
它的頜部結構使之成為特別高效的殺手。
Majungasaurus has a very, very interesting skull.
瑪君龍有個非常有意思的頭顱。
It's not only short and very high, but the bones of the skull are interlocking.
它不僅又短又高，而且頭顱上的骨頭相互緊鎖。
Now, that's important to know because most theropods, most meat eating dinosaurs have very cognatic skulls where their skulls would actually move while they are feeding,helping to protect their teeth from breaking, the bones of their skull from breaking, and also their jaws would expend when they open their mouth.
知道那一點很重要，因為多數獸腳類恐龍，多數肉食恐龍顱骨都比較類似，它們在進食時顱骨其實可以活動，保護牙齒不至于斷落，頭顱上的骨骼也不會斷裂，它們的雙頜在張嘴時能夠拓展。
But Majungasaurus didn't have that ability, so it was really a skull that was solid and had very, very little if any movement.
但是瑪君龍沒有這種能力，它的頭顱很結實就算能活動也只有一點點而已。
Majungasaurus's strength would be its very powerful bite.
瑪君龍的能力在于強大的咬合力。
It was a short powerful skull with a rather powerful neck.
它的頭顱短而有力頸部也很粗壯。
It did the clampdown on something and bite on it.It could deliver a really nasty wound from that.
能緊緊咬住獵物不松口。那樣能造成可怕的傷口。
