Having one of the world's largest garlic crops, Gilroy, California is known as the "garlic capital of the world." On a hot summer day, a pungent odor rises from this farming town which can be smelled miles away. All you have to do is roll down the window of your car and you know you're in Gilroy. 
Believing that garlic helps the body fight many forms of diseases, people add garlic to their cooking in many parts of the world. Moreover, it's popularly used as the poor man's cure-all. During the First World War it was used as an antiseptic. And in the Second World War it was known as "Russian penicillin." Nowadays, thinking that it kills bacteria, some people eat raw garlic as if it were candy.

He has bad breath. 口臭  breath不可数      stink 发臭的
cure-all 万灵丹
Hongkang is known as one of the busiest city in the world.
pungent (气味味道)刺鼻的，辛辣的
Odor smells bad.    Fragrant smells nice.    Arona smells food or cooking nice.
taste  v.尝起来     tasty 好味道       smelly 臭的
What you have to do is (to可省略) study often to master a language.     tasteless 没味道的
chili pepper 红辣椒
be widely  popular
antiseptic 消毒剂       antibiotic 抗生素