unpaid work done either as a form of punishment by a criminal or as a voluntary service by a citizen
社区服务
something that a person spends time doing, particularly to accomplish a certain purpose
活动
to make something more beautiful or attractive, typically by adding decoration or enhancing its appearance
美化
waste such as bottles, papers, etc. that people throw on a sidewalk, park, or other public place
垃圾
to assemble money or resources, particularly in order to achieve or create something
筹集
something that we use to buy and sell goods and services, can be in the form of coins or paper bills
钱
the quantity that is measured in seconds, minutes, hours, etc. using a device like clock
时间
the red liquid that the heart pumps through the body, carrying oxygen to and carbon dioxide from the tissues
血液