1. barometer /bəˈrɔmitə/

-- instrument for measuring atmospheric pressure as an aid in determining probable weather changes

When the barometer indicates a rapid drop in air pressure, it means a storm is coming.

气压计显示出气压快速下降时，便意味着暴风雨快来了。

 

2. chronometer /krəˈnɒmɪtə(r)/

-- instrument for measuring time very accurately

Unlike ordinary clocks and watches, chronometers are little affected by temperature changes or vibration.

精确计时器与普通的钟表不同，它不大受气温变化及震动的影响。

 

3. diameter /daiˈæmitə/

-- (literally, "measure across") straight line passing through the center of a body or figure from one side to the other; length of such a line; thickness; width

Some giant redwood trees measure 325 feet in height and up to 30 feet in diameter.

有些高大的红木高度有325英尺，直径达30英尺。

 

4. meter /ˈmi:tə/

-- 1. device for measuring 2. unit of measure in the metric system; 39.37 inches

When water meters are installed, it will be easy to tell how much water each home is using.

水表安装好后，就很容易读出每家的用水量有多少。

A meter is 3.37 inches longer than a yard.

1米比1码长3.37英寸。

 

5. odometer /əʊˈdɒmɪtə(r)/

-- instrument attached to a vehicle for measuring the distance traversed

All eyes, except the driver's, were fastened on the odometer aas it moved from 9,999.9 to 10,000 miles.

当车上的里程表从9,999.9英里移动到10,000英里时，除了驾驶员，所有的眼睛都盯着它看。

 

6. photometer /fəʊ'tɒmɪtə/

-- instrument for measuring intensity of sight 

The intensity of a sourse of light, such as an electric light bulb, can be measured with photometer.

光源的强度，如一个电灯泡的强度，可用光度测定器测出。

 

7. speedometer /spi:d ˈmi:tə/

-- instrument for measuring speed; tachometer

I advised Dad to slow down as we in a 30-mile-an-hour zone and his speedometer registered more than 40.

我劝父亲把车子开慢点，因为我们在时速限制为30英里的地段上，而他车上的速度计却已超过了40英里。

 

8. symmetry /ˈsimitri/

-- correspondence in measurements, shape, etc., on opposite sides of a dividing line; well-balanced arrangement of parts

As the planes sped by, we were impressed by the perfect symmetry of their V-formation.

当飞机飞过时，那完美匀称的V形排列给我们留下了深刻的印象。