Ring contraction
[化] 环缩小; 环缩小反应\\n[医] 环状收缩
🧩 词语组成解析
ring
[riŋ]
n. 戒指，指环;铃声，钟声;环形物;拳击场;
vt. 形成环状;环绕;使（例如铃）响;打电话给;
vi. 按铃，敲钟;回响;成环形;
contraction
[kən'trækʃən]
n. 收缩，缩减;[语]缩略，略体，缩写;（开支等）缩减;（分娩时）子宫收缩;
🗣️ 情景例句
Well, are you as good a tennis player as your dad?
嗯 ，你是否像爸爸那样是一名优秀的网球选手呢？
Health and understanding are the two great blessing of life.
健康和融洽是人生两大幸事。
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）