Definition (表情)
to make oneself laugh or smile despite not feeling like it; to produce a smile or laugh with effort
勉强挤出笑容；强颜欢笑。
She forced a smile after hearing the news.
听到消息后，她勉强挤出笑容。
Despite feeling nervous, he tried to force a smile.
尽管感到紧张，他还是试着强颜欢笑。
When they told me the joke, I forced a laugh, but to be honest, I didn't think it was funny at all.
当他们告诉我这个笑话时，我勉强笑了出来，但说实话，我一点也不觉得好笑。