如果晚些时候拍摄，到积雪覆盖整座火山之后，火山烟流将在白色背景下难以看到。
If the image had been taken later in the year, when snow covers the entire peninsula, the ash plume would be difficult to see against a white background.
几个小时后拍摄的照片式真色彩图像显示出了海岸边被冲入大洋的沉积物，以及仙台附近的黑色烟流。
The photo-like true-color image acquired a few hours later shows plumes of sediment washed into the ocean along the coast and a dark plume of smoke near Sendai.
（一些自然现象已经证实这一构想的正确，例如在火山喷发的时候，富含大量硫酸盐的烟流被送向平流层，从而暂时的改变全球气候）。
Nature has already shown that this concept can work, since volcanic eruptions that send sulphur-rich plumes into the stratosphere can temporarily alter the world’s climate.
应用因次分析法推导出表征巷（隧）道火灾烟流滚退距离变化规律的通用无因次表达式，该表达式包含影响滚退距离的火源热释放速率、通风风速、巷道倾角和形状等因素。
A non-dimensional expression, which shows the general variation of the backflow distance of smoke and hot gases during a roadway or tunnel fire, was derived through dimensional analysis.
高层建筑火灾时期，通道烟流的温度变化规律是消防工程设计的基础。
During a high rise building fire, the rule of change in smoke temperature is the basis of fire engineering design.
当煤矿井下发生爆炸时会产生一定体积、温度、浓度及密度的毒害烟流。
Poisonous and harmful smoke flow with a certain volume, temperature, concentration and density will be generated during explosion in a coal mine.
矿井火灾时期，火源巷道内高温烟流运动为三维非定常的流动及传热传质过程。
The movement of high temperature smoke in a fire road during mine fire was a three dimensional unsteady flow which is accompanied with heat and mass transfer.
将各种非稳态火源热释放速率计算式嵌入建筑物火灾烟流性状预测软件并进行了算例验证。
Some heat release rate formulas are added to the application software for calculation on the properties of the fire smoke flow in building.
同时，运用建筑物火灾烟气流动性状预测计算软件，分析了门窗开度及流量系数对火灾烟流的影响。
Using the prediction software of the fire smoke flow properties in the building, the effect of the flow coefficient on the fire smoke flow was also studied.
实验结果表明：下行通风角联分支风流的逆转可以归结为烟流和风流异向分层流动的量变过程和风向突变的质变过程。
Results obtained show that reversal procedure of diagonal branch contains two stages, one is stratified flow of smoke and airflow toward different directions, which is a quantitative change stage.
本文采用烟显示和三维流场测量的方法，研究扩压叶栅角涡的物理模式。
The flow visualization by means of smoke and measurement of 3 -d flow field are conducted to investigate physical model of the streamwise corner vortexes in a compressor cascade.
对近期所研制的QN - 1型全流消光式烟度计有效光路的测定进行了较为详细的叙述。
Measure of the effective optical path of QN-1total flow extinction type smoke meter developed recently is described in detail.
在1992年由EPA发表的报告强调了健康的危险，尤其来自于侧流烟。
A report published in 1992 by the US Environmental Protection Agency(EPA) emphasized the health dangers , especially from side-stream smoke.
二手烟包括“侧流烟”(烟草产品燃烧释放的烟)和“主流烟”(吸烟者呼出的烟)。
Secondhand smoke is the combination of "sidestream" smoke (the smoke given off by a burning tobacco product) and "mainstream" smoke (the smoke exhaled by a smoker).
二手烟包括“侧流烟”(烟草产品燃烧释放的烟)和“主流烟”(吸烟者呼出的烟)。
Secondhand smoke is the combination of "sidestream" smoke (the smoke given off by a burning tobacco product) and "mainstream" smoke (the smoke exhaled by a smoker).
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