Princes and princesses have day-jobs and ride bicycles, not horses (or helicopters).
王子和公主们现在都有正经的工作，骑自行车而不是骑马（或直升机）。
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。
They were tamed at an earlier time than horses.
它们比马更早被驯化。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。