“That’s a big question now: What’s keeping the other frogs from developing real teeth on the lower jaw?” Dr. Wiens said.
恩斯博士说：“那是个大问题：什么才能促使其他蛙类在下颌继续长出正真的牙齿呢？”
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“It’s a very clear-cut case of re-evolution because of the large time span, ” said John Wiens, the Stony Brook biologist who authored the paper in the journal Evolution.
"It's a very clear-cut case of re-evolution because of the large time span," said John Wiens, the Stony Brook biologist who authored the paper in the journal evolution.