“中看不中用的东西”可以翻译为 "something that looks good but is not practical/useful" 或者更简洁的表达 "a pretty but useless thing"。
"something that looks good but is not practical/useful"：这个表达较为完整，直接描述了物品外观好看但实用性不强的特点。
"a pretty but useless thing"：这个表达更为简洁，用“pretty”替代了“looks good”，同样传达了物品外观吸引人但无实际用途的意思。