fossil track density古: antiquity; ancientry径迹: track; creep path密度: density; thickness径迹密度: track density裂变径迹密度: fission-track density下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:古径迹密度，即可在微信中查询翻译
