一位身材圆胖、面带笑容、满脸通红的先生出现了。A rotund, smiling, red-faced gentle-man appeared.史蒂文斯先生圆胖的体形the rotund figure of Mr Stevens祖母身材圆胖，整天乐呵呵的。Grandma was plump and jovial....

“圆胖”的英语可以翻译为：chubbiness ...