Radiochronology
[地质]放射测年学
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
Swimming promotes health.
游泳有益健康。
I'd like to know something about your foreign trade policy.
我非常想了解有关贵国对外贸易的政策。