Cách sử dụng
The word 'residuum' is not a very common word in everyday English language. It refers to something that is left over or remaining after a process or event. For example, after boiling water, the white solid substance left in the bottom of the kettle is the residuum. Another example could be the leftover ash after a fire has burned out.This word is usually used in scientific, technical or academic settings, and may not be commonly used in everyday conversation.