As the leaves flip, they snap together, trapping the insect in their sharp-toothed jaws.
当树叶翻转时，它们会合在一起，把昆虫困在它们含有锋利锯齿的颚中。
2
The disappearance of megafauna in America—mammoths, saber-toothed cats, giant sloths, among others—happened relatively soon after the arrival of human beings, about 13,000 years ago.
美洲巨型动物的消失——猛犸象、剑齿猫、巨型树懒等等——发生在人类出现后不久，大约在一万三千年前。
3
It was hard to believe that a panda-eyed, buck-toothed (龅牙) child could be a hero in hearts of millions of people.