Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
thermometer – n. an instrument used for measuring temperature
data – n. facts or information that is produced or stored on a computer
smart – adj. controlled by computers
symptom – n. a change in a person's health which is a sign of a disease
regional – adj. related to or involving a part of a country or state
pandemic – n. an event in which a disease spreads quickly and affects many people over a wide area
epidemic – n. an event in which a disease spreads quickly and affects many people
