Oligocene /'ɒligәusi:n/ 📖 中文释义 n. 渐新世, 渐新统a. 渐新世的, 渐新统的 📘 English Definition(英文释义) n. from 40 million to 25 million years ago; appearance of sabertoothed cats ← oligocarpous O 字母词表 Oligocene epoch →