雪橇由八头飞鹿拉着。

The sleigh is pulled by eight flying reindeer.

youdao

但目前有300,000种生物还没被分类，虽然其中大部分是昆虫及细菌，但不能绝对抹煞那只有圣诞老人才见过的飞鹿的存在的可能性。

BUT there are 300,000 species of living organisms yet to be classified, and while most of these are insects and germs, this does not COMPLETELY rule out flying reindeer which only Santa has ever seen.

youdao

既使是飞鹿，在没有地面磨擦力的情况下能拉十倍于正常的重量，我们还是没法靠那八或九只驯鹿。

Even granting that "flying reindeer" (see #1) could pull 10 TIMES the normal amount, we cannot do the job with 8, or even 9 reindeer.

youdao