Heneicosane is one of the important compounds in organic chemistry.

Eicosane is one of the important compounds in organic chemistry.

Hexacosane is a type of saturated hydrocarbon in organic chemistry.

In the organic chemistry experiment, we succeeded in synthesizing cycloicosane.

The head of the household has a responsibility to protect the safety of all family members.

If you want to study Japanese, there's nothing better than going to Japan.

His work progress is slow.

She was sitting in a ladylike manner.

His story was so tedious that I fell asleep.

I have a waist pouch.