Heat barrier
n. 热障，速度极限
📖 牛津释义
heat barrier
limit on the speed of aircraft, etc caused by heat resulting from air friction 热障（因摩擦生热使飞行器等受到的速度限制）.
🧩 词语组成解析
heat
[hi:t]
n. 热，热度，高温;热烈，激烈;（身体的）发烧，发热;发情;
vt.&vi. 使温暖，使热;激发…的感情，使兴奋;
🗣️ 情景例句
How long does it take you to get through a letter?
你写一封信要花多少时间？
Poverty parteth fellowship.
贫穷断友情。
It is a world of red sandy deserts (hence its name----the Red Planet),
红色行星），