a sad [happy, dark, serious] face
悲しそうな［幸せそうな，暗い，真剣な］顔つき
a sea of faces
ずらりと並んだ顔
a set expression [smile]
こわばった表情［笑顔］
a severe voice [look, expression]
険しい声［顔つき，表情］
A shadow of a smile flickered across his face.
かすかな笑みが彼の顔に浮かんだ
A shy and tentative smile came to the girl's face.
はにかんだ笑顔がその少女の顔に表れた
A smile appeared on his face.
彼の顔に笑みが浮かんだ
A smile broke over her face.
微笑が急に彼女の顔に浮かんだ
a strained smile
無理に作った笑顔
a sweet smile
魅力的な［かわいい］笑顔
