He said it with a hard smile, and went on writing.

他严峻地笑了笑，继续写下去。

youdao

Isn't that like trying to maintain a smile at your wedding reception while some relative gives a toast that amounts to "marriage is hard work”?

这是不是就像你在你的婚宴上试图保持微笑，而一些亲戚给你敬酒，相当于告诉你“婚姻是件苦差事”？

youdao

The young man swallowed hard and forced a smile, "Dad came to all my games, but today was the first time he could see me play, and I wanted to show him I could do it!"

年轻人哽咽着，勉强挤出一个微笑，“父亲观看了我所有的比赛，但是今天他才能真正看到我打比赛，我想告诉他我能行！”

youdao

She was very hard-working and always had a huge smile on her face.

BBC: Heather Stanning win cheered on by Army colleagues

"Camp rule number two is that all the women belong to me, " he says with a smile, though it's hard to tell if he's kidding or not.

FORBES: Catch and Release

"She was an incredible woman, always full of energy and hard at work, but never too tired to share her love and a smile with everyone, " the post said.

CNN: Boston Marathon bombing victims: Promising lives lost