Reciprocative
a. reciprocate（互给；互换）的变形
🗣️ 情景例句
And how old are you?
你几岁了？
A valiant man's look is more than a coward's sword.
勇士的神色胜过懦夫的刀剑。
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）