单词graptolite
n.: 【动】笔石
网络: 笔石纲
【动物;动物学】笔石〔属于腔肠动物的一种化石〕
笔石类
复数：graptolites
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