With a standard drop-down list, the user is limited to choices in the list, but with a combo box, the user can enter a value that is not in the list.

通过标准的下拉列表，用户只能够选择列表中的选项，但是如果使用组合框，那么用户就能够输入一个列表之外的值。

youdao

With a standard drop-down list, the user is limited to choices in the list, but with a combo box, the user can enter a value that is not in the list.

通过标准的下拉列表，用户只能够选择列表中的选项，但是如果使用组合框，那么用户就能够输入一个列表之外的值。

youdao