translation.en: They're born without spots, and they get spots with age, and they go through pretty distinct developmental phases, so that's fun to track their behavior.
translation.zh: 它们出生的时候没有斑点，斑点会随年龄增长而显现 他们会经历一段段蛮独特的发育阶段， 所以，跟踪记录它们的行为是件很有意思的事。