石底河流 的英文怎麼說
中文拼音 [dàndehéliú]
石底河流
英文
hard-bed stream-
I had often stood on the banks of the concord, watching the lapse of the current, an emblem of all progress, following the same law with the system, with time, and all that is made ; the weeds at the bottom gently bending down the stream, shaken by the watery wind, still planted where their seeds had sunk, but erelong to die and go down likewise ; the shining pebbles, not yet anxious to better their condition, the chips and weeds, and occasional logs and stems of trees that floated past, fulfilling their fate, were objects of singular interest to me, and at last i resolved to launch myself on its bosom and float whither it would bear me
我常站在康科德河的岸邊，望著逝去的流水- - -它是一切過程的象徵，和宇宙，和時間及一切造物受同一法則的支配；那河底的水草隨著水流輕柔地彎曲，彷彿受到水底清風的吹拂，此刻還在水底紮根，但不久后就會凋零並隨波濤逝去；那閃亮的鵝卵石- - -它們還不急著尋找更好的去處，那砂石碎屑、藤蔓野草，和那偶爾從水面漂過、奔向命運盡頭的圓木、樹干，都使我產生了極大的興趣，我最終決定泛舟于康科德河的胸膛之上，隨它將我載去任何地方。Iraq is famous for not only its oil, but rivers as well. two most famous rivers are euphrates river and tigris river
伊拉克不僅以石油聞名於世，而且還有兩條著名的河流，幼發拉底河和底格里斯河。The trees impending over it had flung down great branches, from time to time, which choked up the current, and compelled it to form eddies and black depths at some points ; while, in
懸在溪上的樹木常年來投下的大樹枝，阻逼了溪流，在一些地方形成了漩渦和深潭而在溪水暢通流得歡快的地段，則露出河底的石子和閃光的褐砂。I remembered it as it was : a good place to live where everybody knew everybody else, located on the banks of a river of transparent water that raced over a bed of polished stones as huge and white as prehistoric eggs
我記憶里的它誠如其所是：一個很好的居住地，大家互相知根知底，就在河岸邊，清澈透明的河水流過躺著巨大的、白得像史前時期的雞蛋一樣的石頭的河床。In this thesis, first, reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences. then, researches on block stability problems were reviewed, and according to the relationship between grain size and incipient velocity, it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity, and 50 % increase of the velocity will result in about 40 times change of the block weight. after that, experiments were conducted in a flume, focusing on the relationship between incipient velocity and some main factors including block weight, water depth over the dam, cross - section size, block material and river bed material
本文首先根據散拋石壩損毀情況的現場調查資料，結合有關專家多年的整治經驗，總結出壩體的損毀原因及影響因素；對現有塊體穩定性的研究成果進行回顧和總結，並針對散拋石壩的直接損毀現象，結合山區河流的水流、地形特點，利用塊體粒徑與起動流速的關系，提出塊體穩定重量與起動流速高次方成正比的概念，流速50的增長可能導致塊體穩定重量接近40倍的變化；通過二維變坡水槽試驗，研究了壩體穩定的主要影響因素，包括塊體重量、壩頂水深、斷面尺寸、塊體材料（塊石和卵石兩種） 、護底等，結果表明對于山區河流，試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微；最後，根據西部地區的自然、經濟、交通等條件，提出可以採用柔性混凝土鉸鏈體等一類整體性較好的護面層作為散拋石壩的防沖毀措施，以期取得良好的工程效果。分享友人