JENNIFER A.CLACK, a Reader in vertebrate paleontology and doctor of science at the University of Cambridge, has been studying tetrapod origins for 25 years.是什么意思_JENNIFER A.CLACK, a Reader in vertebrate paleontology and doctor of science at the University of Cambridge, has been studying tetrapod origins for 25 years.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句