元素成分

tā men shì bǐ zhě gēn jù xíng tài jié gòu hé yuán sù chéng fèn zuò wéi chāo wēi shēng wù huà shí jìn xíng jiàn dìng de

它们是笔者根据形态、结构和元素成分作为超微生物化石进行鉴定的。

They were identified by authors as ultra microfossils instead of ultra microbes based on their morphology, structure and elemental composition.