Lājītǒng lǐ de dōngxi chòuhōnghōng de, kuài qù dào yīxià.
The stuff in the trash can is really smelly - go empty it quickly.
Tips
grammar
臭烘烘 follows an ABB reduplication pattern where 臭 (A = smelly) is intensified by the repeated syllable 烘烘 (BB). This pattern is common for describing sensory qualities vividly. Other examples: 香喷喷 (fragrant), 油腻腻 (greasy), 脏兮兮 (dirty).
