graptolite

graptolite

美 ['græptəlaɪt] 　英 ['græptəlaɪt]

• n.【动】笔石
• 网络笔石纲

词形变化

复数：graptolites  

英汉解释

n.

1. 【动】笔石

英英解释

n.	1. a small floating sea animal that lived in colonies between about 550 million and 325 million years ago and is now found as a fossil.

例句

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。

Ordovician graptolite fauna characteristics and sedimentary environment of Gongcheng, Guangxi, Chin

广西恭城奥陶纪笔石动物群特征与沉积环境

Silurian High Resolution Graptolite Biostratigraphy and Biotic Recovery in Ziyang, China

中国紫阳志留系高分辨率笔石生物地层与生物复苏

Discovery of Early Silurian graptolite fossils in the Qimantag Group in the western sector of the East Kunlun

东昆仑西段祁漫塔格群早志留世笔石化石的发现