Ddh
abbr. diamond-drill-hole 金刚石钻钻孔; dichlorodimethylhydantoin 二氯二甲海因，二氯二甲基乙内酰胺
🗣️ 情景例句
What do you consider important when looking for a job?
你选择工作时主要考虑是什么？
Don't forget to put stamps on the letter before you mail it.
不要忘记在寄信以前把邮票贴在信封上。
Have you received a letter from Jim yet?
你收到了吉姆的来信没有？