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

He always takes the initiative to act.

This species is known as a senior synonym.

Tetracosane is one of the important compounds in organic chemistry.

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.

I forgot the instructions from my mother.

He is my betrothed.