Hsi
abbr. 水平位置指示器（Horizontal Situation Indicator）；热应力指数（Heat-Stress Index）；恒生指数（Hang Seng Index）
🗣️ 情景例句
Freezing, isn't it?
好冷啊！
I know the boy whose father is a missionary.
我知道那个男孩的父亲是传教士。
Oh! And do you use American or British spelling?
噢！那你们是采用美国拼法还是英国拼法呢？