2 sentences for 疏 (shū — negligent)

1. 面对如此强大的对手，我们的防范万万不可太疏。

   miàn​duì rú​cǐ qiáng​dà de duì​shǒu, wǒ​men de fáng​fàn wàn​wàn bù kě tài shū.

   Facing such a powerful opponent, our vigilance must never be too lax.

   Source: Dong Chinese Dictionary

2. 由于他的疏忽，原本万无一失的计划最终出了岔子。

   yóu​yú tā de shū hū, yuán​běn wàn​wú​yī​shī de jì​huà zuì​zhōng chū le chà​zi.

   Due to his negligence, the plan that was supposed to be foolproof ended up hitting a snag.

   Source: Dong Chinese Dictionary