在求学的道路上，写作文往往是一件令人头大的事，经常不知道怎么写，但必须清醒认识到：拥有好的文笔，绝对是受益一生的硬实力。而写作能力的提升，必须从小培养，对于这篇作文题目，建议多看《有关热气球的英语作文》相关范文，多动笔练习《有关热气球的英语作文》相关习作，相信功夫不负有心人。本文由作文汇用户投稿，希望为你的写作带来帮助，如果觉得这篇有关热气球的英语作文900字不错，记得推荐给同学哦～
导语：相信很多人都想体会坐上热气球的感觉，下面是作文汇小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!
A hot air balloon consists of a bag called the envelope that is capable of containing heated air. Suspended beneath is a gondola or wicker basket (in some long-distance or high-altitude balloons, a capsule),which carries passengers and (usually) a source of heat, in most cases an open flame. The heated air inside the envelope makes it buoyant since it has a lower density than the relatively cold air outside the envelope. As with all aircraft, hot air balloons cannot fly beyond the atmosphere. Unlike gas balloons,the envelope does not have to be sealed at the bottom since the air near the bottom of the envelope is at the same pressure as the air surrounding. For modern sport balloons, the envelope is generally made from nylon fabric and the inlet of the balloon (closest to the burner flame) is made from fire resistant material such as Nomex.
Beginning during the mid-1970s, balloon envelopes have been made in all kinds of shapes, such as rocket ships and the shapes of various commercial products, though the traditional shape remains popular for most non-commercial, and many commercial, applications.
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