Hirt
abbr. High Reynolds Number Tunnel <美>(USAF)高雷诺值风洞
🗣️ 情景例句
Not too bad. How about yourself?
还可以。你怎么样？
I feel much better now.
我感觉好多了。
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）