place·hold·er
noun/ˈpleɪshəʊldə(r)/
/ˈpleɪshəʊldər/
- (specialist) a symbol or piece of text that temporarily replaces something that is missing
（临时替代缺失部分的）占位符，占位文字 - (linguistics) an item which is necessary in a sentence, but does not have real meaning, for example the word ‘it’ in ‘It’s a shame she left.’
位标（句子中必要但无实际意义的词项，如 It's a pity she left 中的 it）