更新时间：2026-06-08 23:50:45
Noun:- a person authorized to act for another
- a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set
placeholder是什么意思 placeholder在线翻译 placeholder什么意思 placeholder的意思 placeholder的翻译 placeholder的解释 placeholder的发音 placeholder的同义词
