Hhd
abbr. 古典文学博士（Humanitatum Doctor, 等于Doctor of Humanities）
🗣️ 情景例句
If you educate the public about dangerous diseases they can protect themselves, which will help to halt the spread.
如果你能教育公众如何来防治危险疾病，他们就能够保护好他们自己，从而阻止疾病的传播。
Do you often play bridge on Saturday?
你常常在星期六玩桥牌吗？
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。