本书作者从计量的视角出发，以贴近生活、易于理解、言简意赅、深入浅出、通俗易懂、生动活泼的方式让大众了解计量、认知计量。全书分为百姓生活、环保节能、交通出行、绿色健康、时代科技为主题五个部分，共收录了90个计量科普知识。

People's Life
1 What does “Beijing time eight o'clock" mean?
2 Does eye protection lamp really protect eyes?
3 What is the area of 1 tatami?
4 How to measure the area of commercial housing?
5 What are the mysteries of the “scale” in the farmers market?
6 How tight is the "tightening bolt"?
7 Do you understand the connection between non-stick pan and metrology?
8 Is the rope of the ropeway safe?
9 Why are the glasses so clean after the “washing" in the optical shop?
10 How much harm does the mosquito repellent product pose to the human body?
11 Do you know the "power stealing thief" at home?
12 What does "net content" mean on the package of goods? 0
13 How is the pressure in household tap water formed?
14 Why do people feel chest congestion on rainy days?
15 Why can't you break an egg in your hands?
16 What is IC card water meter?
17 What are the characteristics of LED lights?
18 How to choose a charge pal?
19 How to choose energy-saving lamps?
20 What determines the clarity of the phone photo?
21 Why is the water not boiling at high altitudes?
Energy Saving
22 How does an air cleaner clean the air?
23 Focus on "Qizhi"
24 What is a master "Zhen Tan"?
25 Is the nano coating actually related to a lotus leaf?
26 What does China Energy Label on household appliances mean ?
27 Is the nominal Horse Power exact in practical use?
28 Does the standard coal really exist in nature?
29 Why does Tesla receive a penalty for exceeding its carbon emissions?
30 How to scale heat metering in winter?
31 What kind of electric kettle is energy-saving?
32 Misunderstanding about energy-saving in the use of air conditioner
33 How to realize heat preservation in building decoration? 115
34 How to measure the “carbon” of carbon emission?
35 Does it work that a magnet can slow a water meter?
36 What is the role of heat meters in heating metering?
37 Are household water-meter, ammeter and gas meter accurate?
38 Common sense about household gas use and exception handling
39 How to determine the number of indoor radiators?
40 Does it save money to equip household heating metering in every family?
41 How can we get the amount of water used showed in the water meter, without a person at home?
Traffic and Travel
42 Is the ride-hailing service accurate?
43 Can "exhalation measure the amount of ethanol present in the breath?
44 Who is monitoring the car for speeding?
45 Where is the thief for taximeter?
46 How to judge the overload of the truck?
47 What is the metrological function of "traffic light"?
48 How to evaluate the value of used cars from a metrological perspective?
49 Is the length of the object related to its motion state?
50 How to evaluate the car configuration from a metrological perspective?
51 Does Jump nozzle" affect the amount of refueling?
52 What is the trick of"short in weight” in fuel dispenser?
Green Health
53 Is X-ray and CT examination a serious hazard to people's health?
54 How to measure medical radiation?
55 Why is food safety inseparable from reference materials?203
56 Setting a fox to keep the geese - does decoration do harm to our life?
57 What is the difference between color Doppler ultrasound and ordinary B-mode ultrasound?
58 How to determine the "soft" and “hard" water quality?
59 How to choose a home ventilator as needed?
60 How to choose the suitable home fetal heart rate monitor?
61 How to choose home blood glucose meter?
62 Why is ultrasound diagnosis needed?
63 Which sphygmomanometer is better for home use?
64 Is your helmet safe enough?
65 Which thermometer is safer to use?
66 How is blood pressure produced?
67 How to monitor the ambient temperature when processing food?
68 Why are the ℃ and °F values of the temperature so different?
69 How to use and maintain home hygrothermograph properly?
70 Do you k