Scales and rulers are used to measure weight and length.
天平和尺子是用来测量重量和长度的。
Units of weight include kilograms and pounds, and units of length include centimeters and inches.
重量的单位包括千克和磅，长度的单位包括厘米和英寸。
These instruments are used to observe very large and very small objects.
这些仪器用于观察非常大和非常小的物体。
Telescopes are used by astronomers, and microscopes are used by biologists and doctors.
天文学家使用望远镜，生物学家和医生使用显微镜。
These appliances are used in the kitchens of almost every home.
几乎每个家庭的厨房都使用这些电器。
Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
炉子用来加热食物，冰箱用来冷藏食物。
Household tools like these are used to build and repair things.
像这样的家用工具是用来建造和修理东西的。
Hammers are used to pound in nails and screwdrivers are used to turn a screw.
锤子用来敲钉子，螺丝刀用来拧螺丝。
