7单元-7F

The idiom "on the face of it" originated from the notion of evaluating or judging something based on its surface appearance or initial impression. It implies that the observed or apparent characteristics suggest a particular understanding or conclusion, but further examination or consideration may reveal a different or more complex reality. The phrase emphasizes the need to delve deeper or look beyond the superficial aspects to obtain a more accurate understanding or assessment of a situation or subject.

The idiom "at the end of the day" is thought to have originated in the 17th century as a way to refer to the end of a workman's day. It was later adopted into figurative use to emphasize what is ultimately important or what matters most. It is often used to contrast the immediate or short-term with the long-term or ultimate consequences of something.

The idiom "call it a day" has its origins in the world of work and labor. It can be traced back to the idea of ending a workday or a shift when it is deemed appropriate or sufficient. The expression suggests that a decision has been made to cease work for the day, often based on factors like completing the necessary tasks, reaching a reasonable point of progress, or acknowledging that further efforts may not yield significant results. Over time, the expression has been adopted into broader contexts beyond work and is used when deciding to stop or conclude any activity.