能见度

The pollution caused by atmospheric particulate PM2.5 is one of the important factors affecting urban visibility, research on the vertical distributive characters of PM2.5 at the ground layer is benefit for the understanding the formation mechanism of the primary pollutants, which will provide a new scientific basis for the comprehensive pollution control. Experiments were carried out from 16, Aug of 2006 to 31, Aug of 2007 on the meteorological tower of 255 m height in Tianjin. The observation of PM2.5 mass concentration with the meteorological elements at three levels of 40 m, 120 in and 220 in are analyzed.

大气细颗粒物PM2.5是导致城市能见度降低的重要原因之一，研究低层大气细颗粒物的垂直分布特征，利于了解边界层内污染物的大气物理化学反应机制，能为大气污染综合治理决策提供新的科学数据。2006年8月16日－2007年8月31日期间以天津市255m气象塔为观测平台，分别在40m、120m和220立方公尺个不同高度进行大气污染物PM2.5质量浓度和气象要素的同步观测。

"Hazy" Good ambiguous name, yesterday in a rare fog enveloped the entire City, a very silly sense of visibility below 10 meters, just go out would be a kind of very exciting feeling, in that space of the Mist stay for a long time, feeling a boring person can not see anything, can only be seen a few zero-Mist dilute the flashing lights of the cars, you do not know what the status outside the 10 meters, or even the traffic lights, you do not know what you will face is how the situation, everything is unknown, that Mende feeling may just be time for everyone to face the unknown of a mind's instinctive reaction to fear.

"雾蒙蒙"好暧昧的一个名字，昨天一场罕见的大雾笼罩整个岛城，很懵懂的感觉，能见度低于十米，刚刚外出会有种很兴奋的感觉，在那种蒙蒙的空间里呆久了，感觉很闷，看不见任何东西，只能蒙蒙中见到几个零稀的车灯在闪烁，你可以不知道十米以外是怎样的状况，甚至是红绿灯，你也不知道你将面临的是怎样的状况，一切都是未知，那种闷得感觉，可能只是每个人面临未知时的一种内心恐惧的本能反应。

Driving around at midafternoon, I noticed that the commenters on the previous blog entry offer up to the minute advice: Visibility and speed are likely to be the traffic problems as you head home...

驾驶左右，在下午，我注意到，该提意见就先前博客条目提供到分钟的忠告：能见度和速度，很可能是交通问题，正如你回家。。。

The atmospheric transmittance database for l064nm laser is created basing on the FASCODE. The model atmosphere is midlatitude summer. The slant path length covers (0~10) km with the alternation of 0.1km. The elevation covers 0°~91° with the alternation of 5° The surface range covers (5~20) km with the alternation of 1km.

利用FASCODE计算出1064nm激光的大气透过率，建成透过率数据库，该数据库对应的大气模型为中纬度夏季，斜程范围为(0~10)km（间隔0.1km），仰角范围为0°~90°（间隔5°），地面能见度范围为(5~20)km（间隔1km），数据库可以根据需要进行扩展。

Visibility is minimal so it is very difficult for him to navigate across the last part of his journey.

能见度是最小的，所以它是非常困难的，在他的最后一部分航行。

Having lights and/or reflectors on the front and back of your bike will increase your visibility to motorist and pedestrians.

有灯光和/或反射的正面和背面的自行车将增加您的能见度驾驶和行人。

Atmospheric optics ; Aerosol optical characteristics ; Visibility sensor ; Integrating nephelometer

大气光学；气溶胶光学特性；能见度仪；积分浊度计

Although the seabed of the Ninepin Group is polluted by sandy mud which causes ill water and low visibility, marine life is especially abundant here, a lot of rich soft corals are found, and is thus my most favourite spot for underwater photography.

虽然果洲群岛的海床受到淤泥污染、水质较为污浊、能见度也较低，但那里蕴藏的海洋生物则非常特别，更有丰富的软珊瑚，所以是我最爱到的潜摄点。

The single optical path method and visibility calibration were used to measure aerosol extinction coefficient.

在研究、分析国外学者的研究基础上提出采用单光路法并结合大气在550nm处的能见度校准的方法测量气溶胶消光系数的研究计划。

The principle of visibility instrument is used that is making use of optical wedge, photoelectric cell etc, to carry out the measurement.

我们利用莎罗诺夫能见度仪器的原理：利用光楔，光电池等进行测量。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。