undertone造句
31. There is an undertone of regret in what he said.
32. There was an undertone of happiness on her smiling face.
33. The young director filmed this story in a bittersweet undertone , playing with fictional and documentary codes.
34. But the debate at an annual Asian-security summit held between June 4th and 6th in the Shangri-La Hotel in Singapore had a sobering undertone.
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