VOA慢速英语:学习被动语态：这是可以做到的！

phrase - n. a group of two or more words that express a single idea but do not usually form a complete sentence

irregular - adj. not normal or usual

practice - v. to do something again and again in order to become better at it

discourage - v. to try to make people not want to do something

memo - n. a usually brief written message from one person or department in an organization or company

dress code - n. a set of rules about what clothing may and may not be worn at a school, office, restaurant, et cetera

sink - n. a wide bowl that has a faucet for water and a drain at the bottom and is usually positioned in a counter

brave - adj. feeling or showing no fear