基础释义
例句
行业词典释义

福克斯词典 \ 英汉词典 \

graptolite是什么意思？

graptolite

英['græptəlaɪt] 美['græptəlaɪt]

n. 笔石（古无脊椎动物，现存化石）；

例句

The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment. 中奥陶世黑色的笔石页岩为典型的半封闭缺氧的深水沉积环境,反映了海水逐步加深,水体也变得相对宁静.
These provide base for the correct measurement and valuing of graptolite reflectivity. 从而为笔石反射率的正确测定和取值奠定了基础.

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行业词典

生物学：笔石；

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