在稳定高压控制下晴好天气，清晨由于晚上地面辐射散热，气温下降到清晨达最低点，空气比较稳定，又没有对流发展，一般情况下清晨都是无风，有风也很小。白天太阳不断升高，地面迅速增温也引起气温急剧上升，热空气膨胀就开始上升，发生对流，四周空气因而也就流来补充形成风。
这种风随太阳高度角增大而增大，到午后二三点钟达最大值。以后由于太阳逐渐西沉，气温逐渐下降，对流停止，风也逐渐趋于变小。这就是正常情况下风的日变化。如果早上开门立即有大风出现，可见此风不可能是稳定高压内部正常日变化情况下的风，而是有新的天气系统移来影响本地，例如锋面、气旋、低槽等。这时云层也比较多，随着这些新的天气系统移来，天气也就将转为阴雨天气。
开门风、闭门雨是说早上起风过一段时间就可能发生降水，并不是说一定要到晚上闭门后才下雨。
Never offer to teach fish to swim. 切莫教鱼游泳。Never put off till tomorrow what may be done today. 今日事，今日毕。Never put the plow
Necessity and oportunity may make a coward valient. 需要和机会可能使懦夫变成勇士。Necessity (or Need) has (or knows) no law. 需要面前无法律。Ne
Always taking out of the meal-tub and never putting in, soon comes to the bottom. 坐吃山空。A maiden with many wooers often c
Better one-eyed than stone-blind. 独眼总比全瞎好。Better poor with honour than rich with shame. 穷得光荣，胜过富得可耻。Better pills may hav
Be slow to promise and quick to perform. 不轻诺，诺必果。Be swift to hear, slow to speak. 多听少说。Better a bachelor’’s life than a
Brevity is the soul of wit. 言以简洁为贵。Bring up a raven and he’’ll pick out your eyes. 养虎贻患。Burn not your house to rid it of
A bad bush is better than the open field. 有胜于无。A bad compromise is better than a good lawsuit. 吃亏的和解也比胜诉强。A bad conscien
有关于狗的谚语英文_英语中关于狗的谚语：They treated him like a dog.他们把他看得猪狗不如。There is no point in having a dog-eat-dog attitude.狗咬狗是不对的。Ev