3 sentences

1. 做出这种轻率的决定是不明智的。

   zuò​chū zhè zhǒng qīng​shuài de jué​dìng shì bù míng​zhì de.

   It is unwise to make such a rash decision.

   Source: Dong Chinese Dictionary

2. 我不想让你轻率地做出这个决定。

   wǒ bù xiǎng ràng nǐ qīng​shuài de zuò​chū zhè gè jué​dìng.

   I don't want you to make this decision lightly.

   Source: OpenSubtitles

3. 他轻率的态度让大家都很不高兴。

   tā qīng​shuài de tài​du ràng dà​jiā dōu hěn bù gāo​xìng.

   His flippant attitude made everyone very unhappy.

   Source: Dong Chinese Dictionary