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
Good afternoon, Mr. Chen. Thank you very much.
下午好，陈先生。非常感谢。
After dinner sit a while; after supper walk a mile.
午餐之后坐片刻，晚饭之后走一里。
Six men have been trapped in a mine for seventeen hours.
6个人被困在矿井里已有17个小时了。