Periodically, this drill, like a biopsy needle, plunges thousands of feet deep into the ice to extract a marrow of gases and isotopes for analysis.
ドリルは氷層の深さ数kmまで 繰り返し挿入され 生検の針のように ガスやアイソトープを含んだ 氷床コアを分析用に取り出します