penetrating radiation的用法和樣例：
例句
- Paleontological studies showed that modern avian groups probably first appeared in the Paleocene and experienced an explosive radiation in the early Cenozoic.
古生物學研究表明，現生鳥類的最早出現是在古新世，而爆發性輻射演化發生在新生代早期。 - Paleontological studies showed that modern avian groups probably first appeared in the Paleocene and experienced an explosive radiation in the early Cenozoic.
古生物學研究表明，現生鳥類的最早出現是在古新世，而爆發性輻射演化發生在新生代早期。
