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 .
