When it reaches an adult weight of 50 tons, nothing can touch it.

成年波塞东龙体重达50吨，谁都不敢动它。

Water makes up 50 to 70 percent of an adult's total body weight.

一个成年人体重的50%—70%由水组成。

To make things worse, fossil evidence shows that juveniles live alone, separated from the herd until they reach at least a third of their adult weight.

更糟的是化石证据表明，幼龙是独居的，它们远离兽群直到体重达到成年龙的三分之一以上。

While cow's milk has a measly 3 to 4% protein, aardvark milk can contain over 13%, making it among the highest-protein milks on earth, giving calves enough nutrition to reach 30% of their adult weight in just three months.

牛奶的蛋白质含量仅为 3% 至 4%，而土豚奶的蛋白质含量却超过 13%，是地球上蛋白质含量最高的牛奶之一，可以为小牛提供足够的营养， 使其在短短三个月内达到成年体重的 30%。