1.rubber n.橡胶；橡皮；决胜局
Money plants and rubber plants are other all-time favorites.
金钱树和橡胶树也是永恒的选择。
2.pollution n.污染
You'll help reduce waste and air pollution.
您可以协助减少废物和空气污染。
3.chronic a.慢性的；长期的
Chronic pain is an invisible and agonizing symptom.
慢性疼痛是一种无形的痛苦症状。
4.hormonal a.激素的，荷尔蒙的
Doctors hypothesize that the main problem is the hormones present in most milk products, which interfere with normal hormonal function.
医生假设主要的问题在于牛奶中的荷尔蒙含量，会打乱正常荷尔蒙的功能。
5.graffiti n.在墙上乱涂乱写
Graffiti may even be as old as writing itself.
涂鸦甚至可以说和文字的存在一样久远。
