R-values
(r-value 的复数) n. 热阻（材料抗热流能力的量度）
🧩 词语组成解析
n. 对价值的看法, 准则, 标准, 价值观念
🗣️ 情景例句
How's your health?
你的身体怎么样？
Have but few friends though many acquaintances.
朋友要少，熟人要多。
Open the window and air the room.
打开窗子，给房间通通风。