A brachiosaurus slimmed down from 32 tonnes to 16 .

腕龙体重从32吨下降到16吨。

Brachiosaurus compared to a human ; credit : matt martyniuk

腕龙与人的对比；感谢马特马丁纽克

Sauropods like brachiosaurus and diplodocus were the biggest beasts to ever roam the earth .

像腕龙和梁龙这样的蜥脚类动物曾是体型冠绝地球的野兽。

Gary packard of colorado state university and his colleagues do not deny that creatures like apatosaurus , brachiosaurus and diplodocus were big-and bigger than any terrestrial mammal .

科罗拉多州立大学加利帕卡德和他的同事并不否认雷龙、腕龙和梁龙是巨型动物，并且认同它们大于任何陆地哺乳动物。