推 suzyn:400萬年前 有發現不具飛行能力的昆蟲化石 但在皆下來的75 01/23 20:29
→ suzyn:百萬年 都沒有發現昆蟲化石 所以間隔是75百萬年沒錯 01/23 20:31
→ charite:謝謝 01/23 20:46
這段話
The study of insect is hampered by a gigantic gap in the fossil record.
Although fossils of early nonflying insects have been found in sediments
dating from the Devonian period nearly 400 million years ago, no insect
^^^^^^^^^^
fossils have turn up from the following 75-million-year period.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
問題為
How wide is the fossil gap?
答案為什麼是^^^說的75-million-year呢
謝謝
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※ 編輯: charite 來自: 114.38.103.8 (01/23 20:13)