英语语法分析

Objective:To synthesize porphyrin derivative.

目的：合成卟啉衍生物。

Multitudinous of the back, in stop porphyrin Wo mind wandering.

沵的背影、在硪脑海里卟停的徘徊。

We found that porphyrin is a kind of good material for optical limiter.

研究发现，卟啉类反饱和吸收材料有很好的光限幅作用。