The key answer of exercise 7

Sample Answer

• activity tracker → An activity tracker is a device or application that monitors and records physical activity, such as steps taken, distance traveled, and sometimes other metrics like calories burned. It is often used for fitness and health tracking.
• in the dark ages → This expression is metaphorical and refers to a period in history considered backward, primitive, or lacking in progress, knowledge, or enlightenment. It's not a literal reference to a specific historical period.
• heart rate → Heart rate refers to the number of heartbeats per unit of time, usually expressed as beats per minute (bpm). It is a crucial indicator of cardiovascular health and fitness, and it can be measured manually or with the help of devices like heart rate monitors.
• times are certainly changing → This phrase reflects the idea that significant changes or advancements are occurring in a given context. It acknowledges a shift or evolution in the way things are done or perceived.
• don't exaggerate → This is a request or advice to not overstate or overemphasize something, to keep statements or descriptions accurate and not to embellish or amplify beyond what is reasonable or truthful. It's a call for moderation in expression.