zhè / bǐ / qián / lái / de / bù / míng / bù / bái / dà / jiā / dōu / bù / gǎn / suí / biàn / shǐ / yòng

这笔钱来得不明不白，大家都不敢随便使用。

The source of this money is unclear and suspicious, so no one dares to use it casually.