信号signal; electric current, voltage, or wave carrying information
学问systematic knowledge that correctly reflects certain objective matters; learning
形势topographical features; situation
心理psychology; thoughts, emotions, etc.
戏剧drama; text/script of a play
效率ratio of useful work to the total work performed; efficiency
消化digest; absorb/assimilate mentally
相对be opposite to each other; relative
细节detail; a small plot used to express the character or the essential characteristics of things