英语语法分析

The pyrene or anthracene-substituted terpyridine ligands was synthesized.

合成了芘、蒽荧光团取代的三联吡啶。

Pyrene is a representative compound among PAH.

芘是多环芳烃的一个代表性化合物。

Second-hand contains carbon monoxide, ammonia, formaldehyde a pyrene and nitrosamines.

二手烟包含了一氧化碳，氨，甲醛，苯和亚硝胺。