[mass noun]social work directly concerned with individuals, especially that involving a study of a person's family history and personal circumstances 社会工作(尤指直接涉及研究个人家庭史和个人情况的工作)
派生 caseworker noun casework2 noun
[mass noun]the decorative outer case protecting the workings of a complex mechanism such as an organ or harpsichord 琴盖