A boy was sitting under a tree, with his back against it, playing on a rough wooden pipe.
一个男孩正坐在树下，背靠着树，在吹一根粗糙的木笛。
Taking shelter under a tree from a midday cloudburst, he puffs on his bamboo water pipe and explains how the economics of tilapia have suddenly turned against him.
他正在树下躲避午后的一场短时暴雨，一边吸着竹质水烟袋，一边向我解释罗非鱼生意为什么一下子就开始难做了。
Lurvy sat down under and apple tree and lit his pipe; the animals sniffed the familiar smell of strong tobacco.
勒维坐在一棵苹果树下，点燃了烟斗，谷仓里的动物们马上就闻到了一股熟悉的烟草味道。
Optimal layout to the tree water-pipe network belongs to typical combination optimal problem.
配水树状管网优化布置属于典型的组合优化问题。
Should be used for well drilling sum finish well system, well drilling Sitong, Christmas tree, Oil pipe head sum administer remit.
应用于钻井和完井系统、钻井四通、采油树、油管头和管汇。
The actual application of the irregular mining method "tree branch form" mining method in the coal pipe is introduced.
介绍了非正规采煤法“树枝状”采煤法在极薄煤层开采中的实际应用；
The utility model provides an integral petroleum production tree, which is characterized in that a pipe cross and mutually connected main bars are a hollow and cuboid integral forging piece;
本实用新型提供一种整体式采油气树，其特征是四通和相互连接的主杆为一个空心长方体的整体锻压件；
Finally, according to research and analyze the fault tree analysis, we establish expert system of pipe-sticking accident based on fault tree.
最后在对故障树分析法的研究分析基础之上，建立了基于故障树的卡钻事故专家系统的原型。
Finally, according to research and analyze the fault tree analysis, we establish expert system of pipe-sticking accident based on fault tree.
最后在对故障树分析法的研究分析基础之上，建立了基于故障树的卡钻事故专家系统的原型。
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