第 7 单元 - 参考

A course is a structured program of study that focuses on a particular subject or topic, usually offered in schools, colleges, or universities. It consists of a series of lessons, assignments, and exams designed to help students learn specific concepts, skills, or knowledge. A course may last for a set period, such as a semester or a year, and can vary in length, difficulty, and content. Courses are typically part of a larger curriculum or academic program and can lead to certifications, diplomas, or degrees once completed. They help individuals gain expertise in specific areas of interest or career paths.

A subject is a specific area of knowledge or study. It refers to a particular field or topic that is taught or learned, such as mathematics, history, science, or literature. Each subject focuses on a distinct set of concepts, principles, and skills, helping individuals gain expertise in that area. Subjects can be broad, like social studies, or more specialized, like chemistry or philosophy. People choose or are assigned subjects to study based on their interests, career goals, or educational requirements. Subjects are typically taught in schools, colleges, and universities and can lead to deeper expertise in a specific field.

The origin of the idiomatic expression "lend a hand" can be traced back to the literal act of physically assisting someone by extending a hand to offer support. It has likely emerged from the universal understanding of reaching out and offering help to those in need. Over time, this idiom have become deeply ingrained in language and culture, emphasizing the importance of being helpful, supportive, and compassionate towards others.

The idiom "with flying colors" is believed to have originated in the 16th century. At the time, flags were used to signal victory in battle. A flag that was flying high and undamaged was seen as a sign of victory, while a flag that was damaged or lowered was seen as a sign of defeat. The phrase "with flying colors" came to be used to describe a person or group who had achieved success or victory. It suggests that the person or group has performed exceptionally well and has surpassed expectations.

The idiom "piece of cake" is used to describe something as very easy or simple to accomplish. It likely originated from the idea that eating a piece of cake is enjoyable and requires little effort. The phrase has been in use in English since the early 20th century and has become a popular way to express how easy a task is.

The idiom "teacher's pet" originated in the late 19th or early 20th century and is used to describe a student who is particularly favored by a teacher or seen as the teacher's favorite. The phrase suggests that the student receives special attention, privileges, or preferential treatment from the teacher, potentially due to their exceptional academic performance or exemplary behavior. However, the term is often used in a slightly derogatory manner to imply that the student may be excessively eager to please the teacher and gain advantages, which can lead to resentment from other students.

The idiom "the deep end" has its origins in the world of swimming pools. It refers to the part of a pool that is furthest from the shallow or safe area, where the water is typically deeper and more challenging to navigate. The deep end is associated with greater risks and difficulties due to its depth. This expression is used to describe a situation or experience that is intense, challenging, or overwhelming.