VOA慢速英语:美国大多数一线工人是女性和少数民族

front line(s) – n. the most important and active position in a job or field of activity

essential – adj. extremely important and necessary

pandemic – n.an occurrence in which a disease spreads very quickly and affects a large number of people over a wide area or throughout the world

invisible – adj. impossible to see

delivery – n. the act of taking something to a person or place

tendon – n. a tough piece of tissue in your body that connects a muscle to a bone

customer(s) – n. someone who buys goods or services from a business

insurance – n. an agreement in which a person makes regular payments to a company and the company promises to pay money if the person is injured or dies, or to pay money equal to the value of something (such as a house or car) if it is damaged, lost, or stolen

quarantine(d) – v. to keep (a person or animal) away from others to prevent a disease from spreading

anxiety – n. fear or nervousness about what might happen

pistol(s) – n. a small gun made to be aimed and fired with one hand