prevent from是什么意思？

Functions : lower the blood pressure and blood fat, prevent from cardiovascular diseases.降血压、降血脂 、 预防脑血栓等心脑血管疾病.To prevent from speaking or crying out by using a gag.堵住嘴塞住嘴以防说活或喊叫.It could prevent from dust , dirty as we...

prevent from的音标：prevent from的英式发音音标为：[pri'vent frɔm]prevent from的美式发音音标为：[prɪ'vɛnt frʌm]...