1.Organohalogen compounds, or OHCs, include dioxins, polychlorinated biphenyls and some pesticides.

1.有机卤化物，或称OHC，包含戴、氯及数种杀虫。

2.In this thesis, a type of biphenyl rod-like liquid crystals and two types of triphenylene discotic liquid crystals were synthesized.

2.本文报道了一类新类棒状液晶化合物和两类并菲盘状液晶化合物合成。