whiten

verb [vi. 不及物动词]vi. 变白

"It's amazing to think that just 60 years ago, we knew next to nothing of the behavior of our sister species in the wild," Whiten says. “
就在60年前，我们几乎对自己野生姐妹物种的行为一无所知，真是令人惊讶。”怀滕说。