求下列翻译，急啊 ~~

concrete gravity dams share certain features with all types of concrete dams.running in virtually a straight line across a broad valley,they resist the horizontal thrust of the retained water entirely by their own weight;at each level in their height the water's thrust is deflected down toward the foundation by the weight of the concrete.in this action their purpose resembles that of the abutment of an arched bridge or the buttresses and pinnacles of a church.a gravity dam is a right-angled triangle;its hypotenuse forms the sloping downstream face.the base width is approximately threequarters the height of the dam

翻译下列短文急求..在线等 急求下列英语句子翻译！！ 翻译下列一句话， 急 急翻译下列文章 翻译下列名句。。急！！ 求下列DRAMA的翻译啊~~~~~~~~~~~` 求下列古文翻译 求翻译下列文字 求翻译下列英语 求翻译下列 职务