Required: Set to true if the field is required field.

required：如果字段是必需字段，就设置为true。

youdao

You can set this color as you like, but the default is yellow. This color indicates that the field is required.

可以将该颜色设置为您喜欢的颜色，默认颜色为黄色，表示该字段是必填字段。

youdao

However, you should not remove an input field when the field is required or should be set to a default value because the field is required.

但是，当某个输入字段是必需的，或者由于该字段是必需的而应该设置为缺省值时，您不应该删除该字段。

youdao

This is an old story at the Pentagon, where the time required to field new systems typically is some multiple of the time it takes for administrations and intellectual fashions to change.

FORBES: Pentagon Buries Networked Warfare Strategy

The Description field is now a required field for a Pass.

ENGADGET: Apple seeds iOS 6 beta 4 to developers: here's the changelog

While gender is increasingly recognised as a critical aspect of development research and practice across the UN, further coordination in this field is required.

UNESCO: Purpose/Objectives of the Chair/UNITWIN Network