Background count
[医] 本底计数
🧩 词语组成解析
🗣️ 情景例句
January the thirtieth and you're invited.
1月30日，希望你能出席。
How long have you stayed there?
你在那儿住多久了？
Last year a journalist had been instructed by a well-known magazine to write an article on the president's palace in a new African republic.
去年，一位记者受一家有名的杂志的委托写一篇关于非洲某个新成立共和国总统府的文章。