Yabla video uses of

běn
bìng
知道 zhīdào
ma
Have you heard of benzopyrene?
另外 lìngwài
香烟 xiāngyān
烟雾 yānwù
zhōng
hái
含有 hányǒu
běn
bìng
děng
多种 duōzhǒng
化学 huàxué
致癌物 zhì'áiwù
Furthermore, cigarette smoke contains carcinogenic agents such as benzene and pyrene,