Background spectrum
[化] 本底谱线图
🧩 词语组成解析
🗣️ 情景例句
Nowadays many TV programs need parental guidance.
现在许多电视节目需要在家长指导下观看。
How do you spell your last name?
你的姓怎么拼法？
Before he retired, Frank was the head of a very large business company, but as a boy he used to work in a small shop.
在退休前，弗兰克是一家非常大的商业公司的经理，但他小时候却在一家小铺里做工。