Summary<\/p>\n
Describing a typical process in an office.<\/p>\n
The topic of this lesson is describing office processes. I have opportunity to :<\/p>\n
Going back to …<\/p>\n
Before we begin, let’me ask\/tell…<\/p>\n
To start, we could …<\/p>\n
Firstly, …<\/p>\n
Next, …<\/p>\n
Following on from this\/that …<\/p>\n
After that, …<\/p>\n
Later on, …<\/p>\n
Following this\/that …<\/p>\n
Subsequently, …<\/p>\n
Finally, …<\/p>\n<\/div>\n
\u00a0How does<\/strong> a four-stroke, piston engine work?<\/strong><\/span><\/p>\n Firstly,<\/span> by the helping of<\/strong> induction system, air<\/strong> is induced<\/strong><\/span> to carburetor.<\/p>\n After that,<\/strong><\/span> the air will be mixed <\/span>with<\/strong> the fuel to become fuel-air mixture in correct ratio.<\/p>\n Next,<\/strong> <\/span>when <\/b>the inlet valve<\/strong> is opened <\/b><\/span>by the controlling of camshaft, the fuel-air mixture is ushered into the cylinder – this process is called “Intake stroke”<\/strong><\/p>\n Then,<\/strong> <\/span>the fuel-air mixture<\/strong> is compressed<\/strong><\/span> when the piston is moving from TDC to BDC – this process is known as “Compress stroke”<\/strong><\/p>\n Following this,<\/strong> <\/span>a spark is provided <\/span><\/strong>by the spark plug and then<\/strong><\/span> the fuel-air mixture would be ignited.<\/span> <\/strong>– this process is the “Power stroke”<\/strong><\/p>\n Later,<\/strong> <\/span>the outlet valve is opened while the inlet valve is closed, so the spend gas<\/strong> could be expelled.<\/strong> <\/span>– this is the “Exhaust stroke”<\/strong><\/p>\n As both camshaft and connection rod is connected to the crankshaft while the spark is continuously provided by spark plug once the engine is started with enough rpm. Subsequently,\u00a0<\/strong><\/span>\u00a0piston is keeping moving from TDC to BDC while the crankshaft is keeping converting linear motion into rotatory motion. Finally,<\/strong>\u00a0<\/span>in case fixed-pitch propeller, as it is directly connected to the crankshaft. Therefore, the chemical energy in fuel is converted in to heat and mechanical energy.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":" Summary Describing a typical process in an office. The topic of this lesson is describing office processes. I have opportunity to : explain a process that takes place in an office learn vocabulary related to product manufacture practise passive forms practise intonation when listing items. [Linking words – explain a process] Going back to …