condensation
noun [ U ] uk/ˌkɒn.denˈseɪ.ʃən/ us/ˌkɑːn-/
凝结的水珠
the drops of water that appear on cold windows or other surfaces, as a result of hot air or steam becoming cool
We get a lot of condensation on the walls in the winter. 冬天，我们的墙上会凝结很多水珠。
（气体的）冷凝，凝结
the act or process of changing from a gas to a liquid or solid state