main el 中文意思是什麼
main el
解釋
邁因-
Data used in this work are north pacific ssta, 160 stations precipitation of china, and ncep reanalysis data. main results are as follow : ( 1 ) it is found that a apparent transition of north pacific ssta in later 1970 ' s : eastern and middle - equatorial pacific ssta turns from cold to warm with area extending, and mid - latitude pacific ( west wind drift zone ) turns from warm to cold. during this transition of ssta, different characters also appear in el nino and la nina : before 1976, la nina happens more frequently, and its duration is longer, el nino zone develops from negative ssta in the early stage ; after 1976, el nino happens a little bit frequent and longer with more intensity than before, el nino zone develops from positive ssta in the early stage ; the course of ssta variation has an enso cycle of 2 - 6 years, annual oscillation of 8 - 9 years, and decadal variation of about 22 years
本文採用1950 - 1999年北太平洋海表溫度（ sst ） 、中國160站夏季降水和ncep再分析的歐亞500hpa高度場等資料，利用eof 、 svd 、小波分析、合成分析和相關分析等方法，在分析北太平洋海溫時空分佈特徵的基礎上，著重探討了海溫異常及其年代際變化對我國東部降水的影響，並對降水、高度場和海溫三者之間的關系進行了分析，以試圖尋找三者異常之間可能的聯系，主要結論如下： （ 1 ） 1976年前後，北太平洋海溫經歷了一次明顯的轉變，赤道中、東太平洋厄爾尼諾海區由冷轉暖，暖水范圍增大，中緯度西風漂流區海溫由暖轉冷；在這樣的年代際背景下，厄爾尼諾、拉尼娜事件在不同的時期也有不同的特徵：在76年前，拉尼娜事件發生頻率高，持續時間長，事件起始於負海溫距平；而76年後，則是厄爾尼諾事件發生頻率略高，持續時間長，強度增大，事件起始於正海溫距平。 -
First, erosion resulting from exce ive deforestation in the u er reaches of the river and, second, heavy silting which raised the riverbed in the main cha el
第一，過度砍伐引起的河流上游的侵蝕，第二，嚴重的泥沙淤積抬高了主幹道的河床。 -
Semisilicon was established in may 1995. our business mainly focuses on ic planning, design, production, and sale. our main products have el driver ic, led control ic and lcd driver ic etc. all these products can be used generally on computer peripheral and consumer products
矽誠科技成立於1995年05月，主要系從事ic半導體設計規劃、製造及銷售，目前主要的產品包括有冷光片驅動ic 、 led控制ic等產品，這些產品可以廣泛地應用於消費性或電腦周邊產品上。
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