酸醋

jù shuō tā céng yǒu yī duàn shí qī wèi le bù fā pàng kào chī mǎ líng shǔ hé suān cù guò rì zi

据说他曾有一段时期为了不发胖靠吃马铃薯和酸醋过日子。

It is said that for a certain period of his life lived on potatoes and vinegar in order to keep thin.