It was quite an achievement to keep smiling when his heart must have been aching.虽然经受着内心的煎熬，但他仍强作欢颜，真不容易。She can shrug off her troubles and keep smiling.她能够把烦恼置之度外而依旧保持笑容。One of the things I like about Susan is the way she always keeps smiling, even when there are problems.我喜欢苏珊的其中一点是她总是面带微笑，即使碰到困难也是如此。