3 sentences

1. 这种药的降压效果非常显著。

   zhè zhǒng yào de jiàng​yā xiào​guǒ fēi​cháng xiǎn​zhù.

   The blood pressure lowering effect of this medicine is very significant.

   Source: Dong Chinese Dictionary

2. 这种安全阀会在压力过高时自动降压。

   zhè zhǒng ān​quán​fá huì zài yā​lì guò gāo shí zì​dòng jiàng​yā.

   This safety valve automatically relieves pressure when it gets too high.

   Source: Dong Chinese Dictionary

3. 变压器负责将高压电降压为民用电压。

   biàn​yā​qì fù​zé jiāng gāo​yā​diàn jiàng​yā wéi mín​yòng diàn​yā.

   Transformers are responsible for stepping down high-voltage electricity to residential voltage.

   Source: Dong Chinese Dictionary