His mother scanned his face to see if he was telling the truth.

他的母亲仔细观察他的面容想查明他是否说真话。

The involved mucose was mainly on the cheek, tongue, lip and gingiva.

虽率高，但只要仔细观察、有效护理，是可以降低口度的。

He examined the man with a penetrating gaze.

他以锐利的目光仔细观察了那个人。

Her face remained impassive,studying the Belgian as he completed the form.

她不动声色,仔细观察正在填写表格的那个比利时人。