She said she was enjoying herself but her smile was forced.
她說自己很快活，但是她的笑容很勉強。
There was a ghost of a smile on his face.
他臉上露出隱隱的一絲微笑。
He never so much as smiled.
他從未笑過。
‘ Oh, hello, ’ he said, with a smile.
“嗨，你好。”他微笑著說。
The woman's fragile face broke into a smile.
那面孔秀麗的女子粲然一笑。