一般要用委婉说法 She's a little bit overweight.
尽量不要用fat,会给人不敬的感觉。
She's a little bit strong.
fat最好不要说,骂人的。
如果是作业的话就写She's a little bit fat
She's a little bit overweight.
fat通常是表示“肥”,让人有被侮辱的感觉。
She is a bit fat.
She is a bit chubby.
She is a little bit on the heavy side.