1 sentence

1. 长期使用尼古丁口香糖还没有被发现是有害的。

   cháng​qī shǐ​yòng ní​gǔ​dīng kǒu​xiāng​táng hái méi​yǒu bèi fā​xiàn shì yǒu hài de.

   Long-term use of nicotine gum has not been found to be harmful.

   Source: CCMatrix