placeholder
n. 位置标志符；占位符
近义词：procurator，proxy，
英英释义
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
例句
用作名词(n.)
- Place the name of the matrix in the placeholder.在占位符处输入矩阵的名字。
- You can replace the placeholder text with your own content.您可以用自己的内容替代占位符文本。