Hexaric acid
[化] 己糖二酸
🧩 词语组成解析
🗣️ 情景例句
about five years ago.
大约五年前。
I've got a terrible pain in my back.
我的背很痛。
It is thought that they arrived more than 30,000 years ago by crossing a land bridge from Asia to America.
他们被认为是在3万多年以前从亚洲跨越一座陆桥来到美洲的。