The rules are something of a mystery 尽管求爱规则让人摸不着头脑

239. the flamingos perform these peculiar courtship dances
     即便在一天中最热的时刻
240. even through the hottest time of the day.
     火烈鸟也在不停表演着奇异的求爱舞蹈
241. They are so eager, they don't even pause to feed.
     他们求爱心切 甚至没时间停下来进食
242. The rules are something of a mystery
     尽管求爱规则让人摸不着头脑
243. but, after a month of dancing,
     但在跳了一个月之后
244. all the birds will have paired off
     所有的鸟儿都配对成功
245. and will be getting ready to mate.
     并准备开始交配

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 242 行