英语听力精选进阶版 13728（在线收听）

Herbal medicines and cancer

Vocabulary

mainstay

essential part

herbal medicine

natural remedies created from plants

toxic

poisonous

slimming aids

pills to aid weight loss

urinary tract

body parts used in the elimination of urine

key

important

incidence

occurrence

concerns

worries

dose

give medicine to

magnitude

significance