Instruments
Scales and rulers are used to measure weight and length.
ps:秤和尺用来测量重量和长度。
Scales斯凯尔斯; 规模，范围，程度; 等级
rulers统治者; 支配者; 直尺; ruler的复数
used to曾经
measure测量; 度量; 量度为; 估量，判定; 措施; 方法; 量; 尺度; 标准; 程度
length长; 长度; 时间的长短; 篇幅; 片长
Units of weight includes kilograms and pounds and units of length includes centimeters and inches.
ps:重量单位包括公斤和磅，长度单位包括厘米和英寸。
Units单独的事物; 单位; 单元; 一件; 班组; 小队; unit的复数
weight重量; 分量; 重; 重物; 在…上加重量; 使负重; 固定; 使加权
includes包括; 包含; 使成为…的一部分; include的第三人称单数
kilograms千克; 公斤; kilogram的复数
pounds英镑(英国货币单位，等于100便士); 镑; 英镑与外币的比值; 反复击打; 连续砰砰地猛击; 咚咚地走; 狂跳，怦怦地跳; pound的第三人称单数和复数
length长; 长度; 时间的长短; 篇幅; 片长
centimeters厘米，公分，0.01米; centimeter的复数
inches英寸(长度单位，等于2.54厘米，1英尺等于12英寸); 少量; 短距离; 谨慎移动;
These instruments are used to observe very large and very small objects.
Telescopes are used by astronomers and microscopes are used by biologists and doctors.
These appliances are used in the kitchens of almost every home.
ps:几乎每家的厨房都使用这些电器。
These这些，他们; 这些; 一些
appliances电器，器具; appliance的复数
used习惯于; 适应; 用过的; 旧的; 二手的; 使用; 利用; 运用; 消耗; 说，写，使用; use的过去分词和过去式
kitchens厨房; kitchen的复数
almost几乎; 差不多
every每一个，每个; 所有可能的; 完全可能的; 每，每逢，每隔
Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
Household tools like these, are used to build and repair things.
ps:像这样的家用工具，用来建造和修理东西。
Household一家人; 家庭; 同住一所房子的人; 家喻户晓的; 家庭的，家内的，一家的; 日常的，家常的，普通的; 王室的
tools工具; 用具，器具，手段，方法; 受人利用的人; 驱车兜风; 驾车到处跑; tool的第三人称单数和复数
used to曾经
build建筑; 建造; 创建; 开发; 逐渐增强; 体形; 体格; 身材
repair修理; 修补; 修缮; 补救; 纠正; 弥补
things东西; 物; 物件; 物品; 事物; 用品，衣服; 用具; thing的复数
Hammers are used to pound in the nails and screwdrivers are used to turn a screw.
ps:锤子用来敲钉子，螺丝刀用来转动螺丝。
used to曾经
pound in用力敲进
nails指甲; 趾甲; 钉; 钉子; 钉牢，固定; 抓获并证明有罪; 抓住; 证明…不属实; 揭露; 揭发; nail的第三人称单数和复数
screwdrivers螺丝刀; 改锥; 伏特加橙汁鸡尾酒; screwdriver的复数
used习惯于; 适应; 用过的; 旧的; 二手的; 使用; 利用; 运用; 消耗; 说，写，使用; use的过去分词和过去式
turn转动，旋转; 转身; 扭转; 翻转; 翻动; 把…翻过来; 转动; 旋动; 转弯，转向; 弯道，转弯处
screw螺丝钉; 螺丝; 旋拧; 性交; 用螺丝固定; 旋紧; 拧紧; 拧上去
Exercises:
1.what would you use to measure the height of your kids?
rulers
2.what is used to measure weight and height?
Scales and rulers
3.two inches is about 5 cm.
4.what would you use to cook some vegetables?
Stoves
5.what is used to observe an object that is very far away?
telescope.
6.Stoves are used to heat food and refrigerators are used to keep foods cool or cold.
7.Household tools like these, are used to build and repair things.
8.we can use a telescope to see objects that are far away.
9. rulers are used to measure length.
