The original value of the feedback message is a blank string.

反馈消息的初始值是一个空白字符串。

youdao

This may be in the form of Null values or other blank value conditions (for example, Spaces) in situations where the data is required.

如果数据是必需的，这可能以null值或其他空白值(例如空格)的形式出现。

youdao

Here the null or blank value does not represent incomplete data, but reflects that the business condition requiring the data has not yet occurred.

在这里，null或空白值并不表示不完整的数据，而是反映需要尚未出现的数据的业务情况。

youdao