Tā / yòng / wú / hén / guà / gōu / bǎ / huà / guà / zài / qiáng / shàng / qǔ / xià / lái / yǐ / hòu / qiáng / miàn / hái / shi / hěn / gān / jìng

他用无痕挂钩把画挂在墙上，取下来以后墙面还是很干净。

He used traceless hooks to hang the picture, and the wall was still clean after he took it down.