placeholder
/ˈpleɪsˌhoʊldɚ/ 名词 C2中文： 占位符
- Something used or included temporarily or as a substitute for something that is not known or must remain generic; that which holds, denotes or reserves a place for something to come later. · This data is a placeholder, so you'll want to include the real numbers as soon as you have them.
- A non-editable caption initially displayed in a blank text box to indicate its function.
复数 placeholders
在真实文章中学习placeholder
注册免费账号后，在图书馆中把鼠标悬停在任何单词上即可看到意思，还能听朗读、收藏单词并按你的记忆安排复习，看到每本书你已经认识多少。