近天顶的

As one of the most often used mountings, the altazimuth mounting satellite tracker has a blind area near the zenith because of the very high azimuth angular velocity, as a result, discontinuous observing data are caused. As for those fast flying satellites, this kind of blind area is very significant because it causes difficulties in precisely determining the satellites' orbits.

作为最常用的一种机架，采用地平式机架的人卫跟踪仪在观测天顶附近区域的目标时，由于方位转速过大而不能连续观测，存在一个固有的天顶盲区，特别是对飞行速度较快的近地卫星，这个盲区的影响是相当大的。

It was late afternoon when I walked out on the foot trail toward the crest of Water Rock Knob, up in the Balsam Range of the southern Appalachians.

天近黄昏之时，我出了门，沿着脚印的踪迹向水岩结节的高顶走去，位于高高的阿帕拉契山脉南部的凤仙花山峦之上。

Over in the west there was the last of the night, and in the east, to the windward, the first of day; and there, clear against the lightening sky, lay a vessel, already quite near, a very large two-masted double hulled canoe with a broad platform or deck overlapping the hulls with a thatched house upon it; and the vessel had two towering fore and aft sails, each with a curved crest reaching forwards.

在西面是黑夜的最后残余，在东面、在顶风的方向，则是一天的开始；而在那儿，在渐渐变亮的天空背景下，可以清楚地看见一艘海船，离他们已经很近了，那是一条很大的双桅杆、双船体的木舟，带有宽阔的平台或者甲板，平台覆盖在两个船身上面，平台上有座草顶的木屋；这条船扯着两面高高的前后帆，每一面帆都有朝前弯曲的冠顶。

Who ride wit us When the six-tray bounce, the street scrapin the bumper wit the sound for the summer that be thumpin and hummin Hoppin up the 'Shaw on a Sunday, what a fun day Dip skip trippin and whippin down the one-way Diggy Daz a busta ain't had enough against rough and rough but it's never too much Daz Kurupt, Kurupt and Daz on that ass We clash blast suckers just like a head on crash This ain't back in the day, you get taught and sprayed AK front to the back cause we hard to fade We enormous, we attackin it plus we swarmin to Rumble in the Jungle like Ali and Foreman Kurupt We rippin it up, we be givin it up On the daily homeboy we be givin it up We be cuttin it up, scufflin to muffle it up Homeboy Diggy Daz Who ride wit us Livin it up -- shakin, makin the hood turn Boil and burn, two buckets of yearn Flippin stickin fools for chicken, scrapin the curbs Scrappin for the domes straight to the head Thunderbird I'm on it homey, me and my homegirl Diamond Down with a nigga damn near before a nigga was rhymin Daz, my closest homeboy California lickin switches a couple toys Retirin ?

谁坐我们的智慧当六盘反弹，街头scrapin缓冲器智慧的声音的夏天是thumpin和hummin Hoppin了'肖星期日，什么是同乐日浸跳过trippin和whippin了单程 Diggy Daz 1布斯塔是没有足够的对粗糙和粗糙，但它从来没有太多 Daz Kurupt ， Kurupt和Daz的屁股上我们冲突爆炸吸盘一样的头部撞击这不是在一天，你就会得到教导和喷涂支AK回到前面的原因，我们很难褪色我们巨大的，我们attackin它加上我们swarmin 以火爆的森林，阿里和福尔曼 Kurupt 我们rippin它，我们将givin它巨蟹座的日常生活，我们是givin它我们将cuttin了， scufflin以抑制它巨蟹座Diggy Daz 谁坐我们的智慧它生存- shakin ，金之交的遮光罩煮沸和烧伤，两个水桶渴望 Flippin stickin傻瓜的鸡， scrapin的限制 Scrappin的穹顶直头部雷鸟我在这家，我和我的homegirl钻石下跌了近nigga该死在nigga是rhymin Daz ，我亲密的巨蟹座加利福尼亚州一对夫妇lickin开关玩具 Retirin ？

The results showed that the red /blue color index during twilight changed evidently with AODs in lower atmosphere. When AOD was small, there was a maximum of the radiance at 450nm in the high view elevation angle. So the sky color at the zenith is blue. However, the maximum shifted to red wavelength (about 700nm) with the fall of view elevation angle.

计算结果分析表明，曙暮光时天空辐射强度的红蓝光颜色指数随近地层大气气溶胶光学厚度的变化显著；当τ较小时，太阳辐射随波长的变化显著，在高仰角450nm附近有极大值，天顶方向以蓝色调为主；而在低仰角极大值向红光方向移动。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。