如何使用 "firn" 造句
- 1. Atmospheric histories of halocarbons from analysis of antarctic firn air .
- 从南极永久性积雪空气分析大气卤烃的历史：甲基溴化物。
- 2. " Firn : granular , partially consolidated snow that has passed through one summer melt season but is not yet glacial ice . "
- “粒雪，万年雪：经过一个夏季的溶化期但仍未成冰川的粒状且部分沉固的雪。”