The fourth-generation theory divides things into four categories-ABCD-according to their urgency and importance.

第四代理论把事情按紧急和重要程度分为 ABCD 四类。

youdao

They just came this week from the ABCD Camp.

他们这周刚从ABCD夏令营回来。

youdao

Now, especially if your password is “abcd” or “password”.

现在，尤其如果你的密码设得过于平常，容易被人猜到。

youdao

Instead of abcd a creative young mind will feed off an inspiring story.

FORBES: He��s just an everyday kid, 16 year-old Jack Andraka

The III Encounter of ABCD Filmmakers will take place in Ouagadougou, Burkina Faso, in February 2013, with the support of the Pan-African Film and Television Festival of Ouagadougou (FESPACO).

UNESCO: MEDIA SERVICES