尖锐的声音突然打破了寂静。

Jiānruì de shēngyīn tūrán dǎpòle jìjìng.

A sharp sound suddenly broke the silence.

尖锐的问题需要深入思考和解决。

Jiānruì de wèntí xūyào shēnrù sīkǎo hé jiějué.

Sharp problems require deep thinking and solutions.

这把刀的刀刃非常尖锐。

Zhè bǎ dāo de dāo rèn fēicháng jiānruì.

The blade of this knife is very sharp.