VOA慢速英语:为什么处方药的标识是Rx

guess – n. an attempt to give an opinion or answer about something when you do not know much about it or are not sure about it

symbol – n. a letter, group of letters, character, or picture that is used instead of a word or group of words

prescription – n. a written message from a doctor that officially tells someone to use a medicine, therapy, etc.

legend – n. a story coming down from the past

demon – n. an evil spirit

make it up to (someone) – phrase : to do something helpful or good for (someone one has hurt or treated wrongly)

keep an eye on – phrase : watch someone or something carefully; to be attentive to someone or something

stand (someone) up – phrase : fail to meet someone for a date, meeting, or appointment, especially without telling them