雅思小作文范文-流程图

admin管理员组

文章数量:1535375

2024年4月26日发(作者：)

1. The process of brick manufacturing.

注意：

1. 介绍过程要使用一般现在时

2. 使用定语从句将有关联的两句话连接。

3. 大量使用被动语态。

4. 使用一些表示顺序的连接词。

5. 一般不需要写总结。

The flow chart illustrates the production process of bricks usually used in building industry.

Generally, seven stages are included, from material exploitation to delivery.

Firstly, underground clay is dug up as the raw material by a large digger. Clay lumps are then

stacked on a metal grid which serves to break up chunks into much smaller pieces. After falling

on a roller, the stuff is further conveyed and mixed with sand and water.

In following stage, the well-blended compound is pressed in a mould or cut by a wire cutter, in

order to form brick-shaped pieces. During next 24-48 hours, dozens of these fresh bricks are kept

in a room, namely drying oven.

Once the bricks are dry, the next stage is heating and cooling process. bricks are transferred in a

so-called kiln, another type of hotter oven, in which they are burned twice, moderately and highly,

in temperature from 200°C-980°C to about 870°C-1300°C. This is followed by depositing heated

bricks in a cooling chamber for 2 or 3 days.

Finally, cooled hard bricks get packed and delivered by trucks to their destination, a building site.

（194）

2. The production of steam using a gas cooled nuclear reactor.

1. 看懂基本过程和原理，定位流程的起点和终点。

2. 按照箭头依次进行描述，不能出现顺序颠倒，或是过程缺失。

3. 图中的文字提示应加入到描述之中。

4. 分段原则：流程图基本不分段，一个主体段包含所有过程，但请注意过程之间的连接词，eg,首先，然后，

接下来，最后。

The process of how a gas-cooled nuclear reactor works consists of the reactor itself and a heat

exchanger.

The reactor contains uranium fuel elements which are surrounded by graphite moderators and

topped by charge tubes for loading fuel elements, and boron control rods. The whole reactor is

contained in a pressure vessel surrounded by a concrete shield.

From the reactor the hot gas flows through a duct into the heat exchanger which is outside the

concrete radiation shielding. In the heat exchanger, steam is generated in a secondary loop. There

a pipe brings in water which is heated to steam, and this then flows out to the turbo-alternator.

Meanwhile the hot gas sinks to the bottom of the heat exchanger and passes through a gas

blower which pushes it into a cool gas duct and back to the reactor.

As can be seen, this is a continuous cycle that keeps the reactor from overheating, while carrying

away the heat and steam, which will power the turbines.（166）

本文标签： 过程使用顺序描述