單詞
graptolite
英 ['ɡr?pt?la?t]
美
基本信息
- [古生] 筆石動物
- [古生] 筆石
英文詞源
- graptolite (n.)
- fossilized colonial animal from the Cambrian and later, 1838, from Modern Latin graptolithus, literally "written-stone," from Greek graptos "engraved, written, painted" (verbal adjective of graphein; see -graphy) + lithos "stone" (see litho-). So called because the fossils resemble pens. Related: Graptolitic.
雙語例句
- 1. These provide base for the correct measurement and valuing of graptolite reflectivity.
- 從而為筆石反射率的正確測定和取值奠定了基礎(chǔ).
來自互聯(lián)網(wǎng)
- 2. The black graptolite shale facies indicate a deep - water, half enclosed and anoxic sedimentary environment.
- 中奧陶世黑色的筆石頁巖為典型的半封閉缺氧的深水沉積環(huán)境,反映了海水逐步加深,水體也變得相對寧靜.
來自互聯(lián)網(wǎng)
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