Senses
熔炉/ 熔爐 smelting furnace
A furnace or forge used for smelting or melting metal.
熔炉/ 熔爐 melting pot
A place or situation where different cultures, races, ideas, or styles are fused or blended together
熔炉/ 熔爐 crucible
A harsh environment or difficult situation that tests and tempers a person's character or skills