However, when we play the harmonica, the sound we hear is not the actual vibration of the reed itself, but instead the sound of a column of air being set into motion by that reed.

但是性无码专区无码视频在线观看，在我們吹奏口琴的時候人妻人人操人人爽，所聽到的口琴聲卻不是由簧片本身的振動產(chǎn)生的在线观看麻豆。

Esp., most of the paddy rice, straw, rice leaves, rice husks, timber components, saw dust, reed and reed basketwork, rope and various plant stems and leaves, fruits etc. were in bright colors; among the paddy rice remains, the embossed veins and palea on the surface of some rice husks were also as clear-cut as original, so it was with a small amount of whole rice that connected the straw and ears of rice; there were some deposits mixed by rice husks, straws and rice leaves etc. crossed in several small layers under Layer 3, some looked like current objects, people would have such illusion that these were just fallen down on earth yesterday upon uncovering and could hardly believe that they were from thousands of years ago.

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Owing to that the main shaft speed and the beating speed of reed can not attain the normal values at setting - on, the warp tension and the beating force of the reed can neither reach the normal level.

織機開關(guān)車時由于主軸轉(zhuǎn)速456欧美视频在线、鋼筘打緯速度達不到正常數(shù)值羞羞AV漫画在线漫画网免费福利，使經(jīng)紗張力及鋼筘打緯力達不到一定的正常數(shù)值，以致打緯過程中經(jīng)緯紗線相對滑移量比織機正常運轉(zhuǎn)時的數(shù)值小黄色工厂-这里都是精品、共同移動量比正常運轉(zhuǎn)時的數(shù)值大嗯啊青草操，所形成的織物達不到正常的緯密，在織物上產(chǎn)生橫檔疵點曰韩一级A片欧美一级A片。

Two ecotypes of reed (Phragmites communis Trin.), swamp reed and heavy salt meadow reed growing in the desert regions of Hexi Corridor are ideal materials for mechanism study on salinity-resistance/tolerance of plants.

分布于甘肅省河西走廊沙漠地區(qū)的不同生態(tài)型蘆葦（水生蘆葦和重度鹽化草甸蘆葦）是研究植物抗/耐鹽機制的良好材料一本在线无码视频免费。

In the British Isles, common reed used for this purpose is known as Norfolk reed or water reed.

蘆葦桿含有纖維素，可以用來造紙和人造纖維亞洲精選精品黃色視頻。

Dune reed and swamp reed are two main reed ecotypes. Great difference exists between them in the resistance to environment conditions.

這些在長期穩(wěn)定的自然條件下變異形成的生態(tài)型是我們研究植物抗逆機理的理想實驗體系99伦乱视频。

On the other hand,the means have no apparent influences on soil and the growth of reed,furthermore,it provides suitable water and fertilizer to reed and promote reed to grow.

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Water area and cropland were the main land cover types that reed converted. Lower places in north and east parts of Baiyang Lake were the ones occurred the conversion between reed land and water area, and higher places in northwest and southwest occurred the conversion between reed land and cropland.

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"The reed instruments are further divided into single-reed and double-reed instruments, such as the clarinet and the oboe ."

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The results show that, the nitrate-N concentration in groundwater in the reed area was 0.2~0.8mg/L and significantly lower than that in surrounding wells (more than 20mg/L), and the reed wetland can remove nitrate pollution in shallow groundwater. The distribution of denitrifying bacteria showed obvious rhizosphere effect, and the higher biodenitrification in natural reed wetland was related to the distribution of denitrifying bacteria. There was a negative relationship between the nitrate-N concentration and the number of denitrifying bacteria in groundwater.

結(jié)果表明：蘆葦區(qū)淺層地下水中硝酸鹽氮僅為0.2~0.8mg/L欧美熟妇爱大黑吊性爱视频，遠低于濕地周圍井水中硝酸鹽氮質(zhì)量濃度（大于20mg/L），蘆葦濕地能夠去除淺層地下水中硝酸鹽污染日韩毛片无码一区二区；反硝化細菌在土壤中的分布呈現(xiàn)明顯的根際效應(yīng)狼狼国产欧美在线视频；野生蘆葦濕地較強的生物脫氮作用與反硝化細菌分布有關(guān)，地下水中硝酸鹽氮含量與反硝化細菌分布呈負相關(guān)久久久久国产精品视频。