She managed to force a smile.

她勉强笑笑。

《牛津词典》

Candy's face reddens, but she manages to force a smile.

凯蒂的脸涨红，却强挤出了一丝笑容。

youdao

But I force a smile, knowing that my ambition far exceeded my talent.

我依然强颜欢笑，我知道我的野心比我的实力高得多。

youdao

She would force a smile and depart, quietly closing the door behind her, as if I were not hers.

NEWYORKER: Naima

According to two researchers at the University of Kansas, the heart rates of people tested recovering from stress were 7% slower, if they gripped a pair of chopsticks in their teeth in such a way as to force themselves to smile.

FORBES: New Data on Smiling

Shopping not only "makes us all happy and smile, " it is also a major economic force, Lowy noted.

CNN: Europe's largest shopping mall gets Olympics boost