VOA慢速英语:美国移民在照顾老年人、残疾人方面发挥着重要作用

rely - v. to need (someone or something) for support, help, etc. : to depend on (someone or something

particularly - adv. more than usually

survey - n. an activity in which many people are asked a question or a series of questions in order to gather information about what most people do or think about something

applicant - n. someone who formally asks for something (such as a job or admission to a college) : someone who applies for something

counter - n. something that is made or done as a defense against or response to something else

category - n. a group of people or things that are similar in some way

round-the-clock - n. happening or continuing all day and all night

gap - n. a space between two people or things