Hls
abbr. holes 洞; heavy liquid separation 重质液体分离; heavy logistics support 大型后勤支援; hills （复数）高地
🗣️ 情景例句
We like to go to the theater together.
我们常一起去看戏。
That won't happen, will it?
不会吧？
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）