Qi
abbr. 质量指标（Quality Index）
🗣️ 情景例句
and you care about me
和我
The war threatened his well-being.
战争威胁他的幸福。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）