agape

1. ADJ If you describe someone as having their mouth agape, their mouth is open very wide, often because they are very surprised by something. (通常是惊得)大张着嘴的; 瞠目结舌的[书面] [v-link ADJ]

She stood looking at Carmen with her mouth agape. 她站在那里看着卡曼，嘴巴大张着。