trace考研四级六级 /treis/

Now, researchers have used the genomes of over 200 donkeys to trace their domestication back to a single event around 7,000 years ago in East Africa - about 3,000 years before humans tamed horses.

现在，研究人员利用了200多匹驴的基因组，追溯它们的驯化历史，发现大约在7000年前的东非发生了一次单一的驯化事件——这比人类驯化马早了约3000年。