關於Cumstomary的意思和用法的提問

A: Conventional is old school, things from the past.
Conventional weapons refer to knives and swords. Unconventional weapons, nuclear warheads.
Conventional way of making noodles is by hand. Unconventional way is by machine.

Customary is referencing specifically more towards society and people with traditions from the past.

Customary to greet your elders.
Customary for younger Koreans to face away when drinking soju in front of elders.