be all eyes 目不转睛；全神贯注地看；极注意地看着；极注意地看着；非常留神

【例句】
The children were all eyes as we opened the parcel.
孩子们目不转睛地看著我们把包裹打开。

He was all eyes at the scene.
他全神贯注地注视着述情景。