Students should do surveys, visit museums, take part in charity work and hand in reports for teachers to decide on their marks.
学生应该通过做调查，参观博物馆，参加公益劳动，上交给老师的这些活动的报告，决定他们的成绩。
Synchronous serve and asynchronous receive can be particularly useful in cases where external clients take part in application processing by sending messages to the application.
如果外部客户端通过向应用程序发送消息来参与应用程序处理，同步服务和异步接收将尤为有用。
Subjects or participants - Who will take part in your study ?
