1 sentence

1. 研究表明，吸烟量与肺癌发病率呈正相关。

   yán​jiū biǎo​míng, xī​yān liàng yǔ fèi'ái fā​bìng​lǜ chéng zhèng​xiāng​guān.

   Research shows that smoking volume is positively correlated with the incidence of lung cancer.

   Source: Dong Chinese Dictionary