The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

結果當大氣壓低于正常值2kPa時欧美欧美日韩日韩在线综合，受試者言語頻率的純音聽閾顯著提高（均P〈0.01），鼓室壓力值發(fā)生顯著改變（P〈0.05）国内网红AA黄色视频；當大氣壓低于正常值4kPa時91在线论坛，受試者500av最新资源、2000Hz的純音聽閾顯著提高（P〈0.01和P〈0.05）日韩在线丝袜福利网站大全，鼓室壓力值發(fā)生顯著改變（P〈0.01）特黄特色A级无码毛片视频。

MethodsTwenty volunteers with normal hearing level and tympanic pressure were enrolled and kept at airtight container. The inner pressure was changed to 2 kPa and 4 kPa below normal atmospheric pressure in 50 s and recovered to the normal pressure, the pure tune hearing threshold of 500, 1 000 and 2 000 Hz and tympanic pressure were measured, and acoustic impedance curve characteristic and tympanic membrane appearance were recorded at each time points.

方法選取聽力和鼓室壓力正常的受試者20例，即單耳40耳AAA黄片免费，評估其于50s改變密閉模擬電梯容器壓力低于正常大氣壓2kPa、50s改變密閉容器壓力低于正常大氣壓4kPa黄色午夜网站、以及壓力恢復至正常水平時，言語頻率500久久免费一级黄色视频、1000一级黄色av、2000Hz的純音聽閾又长又大又硬黄色，鼓室壓值和聲阻抗曲線圖形形態(tài)，以及鼓膜形態(tài)亚洲一区精品黄。

Experts from meteorological department pointed out that the reason why it snowed at that time is that the atmospheric pressure above the area dropped suddenly to 950 millibars. It was 20 millibars lower than the limit of the normal atmospheric pressure. In June, 2000, the temperature in Koppaonike City, a small town in the plain of Yugoslavia, was over 15 degrees centigrade all along. But in midday of June 17 it dropped suddenly to zero or below. Then a heavy snow fell on. This surprised the local residents. People went to street one after another to have a look.

氣象部門指出一级做a爰片久久毛片A片美国，當時出現(xiàn)雷電的原因是當?shù)厣峡諝鈮后E降至950毫巴，比正常氣壓極限低了20毫巴欧美性爱在线播放久草。2000年6月国产片黄片A片，南斯拉夫平原小城科帕奧尼克的溫度一直在15攝氏度以上，但17日中午亚洲一级av无码毛片精品，小城的溫度驟降到攝氏零度以下一级欧美性爱网站，接著天空就飄起了大片的雪花，這一情景讓當?shù)氐木用耋@奇不已天天黄色视频入口，紛紛上街觀看。

atomize：使霧化

at normal atmospheric pressure 在標準大氣壓下 | atomize 使霧化 | attached in-line emitter 在制作過程中膠合或焊接在滴灌帶(或軟管)上的內置式噴頭(滴頭)