据估计，破裂的冰重达300万吨。
It is estimated that the ice that broke off weighed three million tons.
你如何将植物纤维一个个地用手折断，然后把它们变成一根足够结实到可以系住一艘重达数千吨的船的绳子呢？
How do you take plant fibers that individually you could break with your hands and turn them into a rope that's strong enough to moor a ship that weighs thousands of tons?
即使是一个瘦形梁龙，曾经被认为在活着的时候重达5.5吨，现在也减重了1.5吨。
Even a slender diplodocus, once believed to have tipped the scales at five and a half tonnes when alive, has lost a tonne and a half from its weight.
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