tā / biǎo / miàn / shàng / tài / dù / qiáng / yìng / yù / dào / kùn / nán / jiù / tuì / suō / zhēn / shi / wài / qiáng / zhōng / gān

他表面上态度强硬，遇到困难就退缩，真是外强中干。

He seems tough on the surface but backs down when faced with difficulties; he is all show and no substance.