原文出自CNN杂志, 其中有句是这样:
We're not quite sure why they're pink in color. When they're dead,
they become white in color. So we think that the pink color may be
sort of a blushing effect, that that's how they regulate their internal heat.
最后一句 "that that's how they ..." 中，
1. 第一个that是不是指前一句 "sort of a blushing effect" ?
2. "that that's how they..." 这句能否变成 "that's how they...."
(省略第一个that)
谢谢.

第一个that是同上句think that 这种作用的that: think that(that's how...)that's how的that才是指blushing effect