R-value
n. 热阻（材料抗热流能力的量度）
🧩 词语组成解析
🗣️ 情景例句
My mother is a housewife and my father is retired.
我妈妈是家庭妇女，我爸爸退休了。
What did the doctor say?
医生说了什么吗？
supplying the rocket fuels for its ships,
作为航天飞船的燃料。