unconvincingly

She smiled unconvincingly when told that the messy room looked 'artistic'.

(Chinese) 当被告知那个乱七八糟的房间看起来“有艺术感”时，她牵强地笑了笑。

The suspect argued unconvincingly that he had never seen the stolen items before.

(Chinese) 嫌疑人苍白无力地辩解说，他以前从未见过这些失窃物品。