雅思小作文解析及范文:保溫瓶奏效的信息
思路解析：
1. 靜態(tài)流程圖的特點在于對于一個物體的細(xì)節(jié)描述，可采用順序描述，eg.由內(nèi)至外，由外至內(nèi)，由上至下等。
2. 注意對于功能原理的闡述。eg，vaccum是一種不良導(dǎo)體，它會保持熱量，而不是傳導(dǎo)。
3. 注意物體形狀和輪廓的描述。
參考范文：
The diagram indicates the structure and working process of a thermos flask.
The thermos flask is used to keep the liquids and remain the temperature. Its most common use is to keep hot drinks, for example coffee, hot but you can also use it to keep things like milk cold.
A thermos flask is a cylinder-shaped object between 30 and 40 cm high. The inside of the thermos flask is a flask made of glass. There is nearly no air inside this glass, so it is a very poor conductor. In addition, the glass is silvered, which reduces infrared radiation. This vacuum flask is surrounded by another cylinder made of metal or plastic, which protects the fragile glass inside.
The top is a plug or cap, usually made of cork or plastic, which is covered by a plastic cup. This is taken off and used to drink the liquid from. Some heat escapes from the cap but the special design of the thermos flask means that liquid maintains its temperature for several hours.
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