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.

My cat often sleeps in a catloaf pose.

In the margin of this text, important annotations are written.

His role is the team leader.

It's difficult to solve division problems.