open-mouthed

The uncivilized guest chewed with his mouth open.

举止粗鲁的客人张着巴咀嚼着。

Open your mouth wide.

张大你的。

He opened his mouth to make a caustic retort.

他张始进行刻薄的反击。

She opened her mouth to receive the papery-thin wafer.

她张受薄薄的圣饼。

Gawp (at) means to look at someone or something in a foolish way with the mouth open.

指傻头傻脑地张着看某人或某物。

The minute the door opened, I felt too stunned to open my mouth, staring at her scorched and toilworn face under the glaring lamp, as if an ancient thread-bound book.

惨亮的灯光下，她枯黄憔悴如同一册古老的线装书。