英语语法分析

Benzopyrene is a common high activity indirect carcinogen.

苯并芘是一种常见的高活性间接致癌物。

A large number of hydrocarbons such as benzopyrene are also mutagenic.

大量碳氢化合物如苯并芘也是诱变剂。

Fluoranthene, perylene, pyrene benzopyrene and benzopyrene have been proposed as the input of terrigenous higher plant.

荧蒽、苝、芘、苯并荧蒽和苯并芘等化合物标志着以高等植物为主的母源输入类型。