一次

First, the speed of the reaction between mud acid and rock is very fast, the effective distance of acid is short, active acid can not reach deep formation.

首先，高温下常规土酸与地层矿物反应速度极快，酸液有效作用距离短，活性酸不能到达地层深部；其次，HF与铝硅酸盐的化学反应不是简单的一次反应，其副产物氟硅酸和氟铝化物还可与铝硅酸盐发生二次反应和三次反应，形成一系列不溶性的沉淀物，对储层造成严重伤害；第三，高温情况下酸液对井下管柱及工具腐蚀性很强，对缓蚀剂性能要求高。

The waist side air has some effects on controlling size of the recirculation zone and the sectional recirculation ratio, and it can decrease temperature of the recirculation zone, the ignition point is adjustable by means of changing the ratio of the waist air.

双通道燃烧器的腰部风射流、中二次风射流和下二次风射流在控制回流区强度和温度、加强风粉气流混合和增强下一次风射流刚性方面有不同的作用，实际应用中应根据燃料的着火性能、燃尽性能和结渣性能等特性合理选择使用上述措施。

He took part in numerous campaigns, like "Three Battles to the South of the Songhuajiang River","Four Operations for Safeguarding Linjiang", the "Liaoxi-Shenyang Campaign", the "Beiping-Tianjin Campaign", the "Operation across the Changjiang River", the "Anabasis to Sichuan", the "Bandit Suppression in Western Hunan", the "War to Resist US Aggression and Aid Korea", and so on. Having fought bravely and having repeatedly established wonderful merits, Zhang Guofu was awarded one Special-Class Merit Citation, two Excellent Merit Citations, and five Merit Citations successively and was awarded the honorary titles of "Solitary Hero","Trailbreaker","Young Combat Hero", etc, by the 4th Field Army.

他参加过"三下江南"、"四保临江"、"辽沈战役"、"平津战役"、"渡江作战"、"进军四川"、"湘西剿匪"和"抗美援朝"等众多战役，因作战勇敢，屡建奇功，张国福先后荣立特等功一次、大功两次、小功五次，并荣获"四野"授予的"孤胆英雄"、"开路先锋"、"青年战斗英雄"等荣誉称号。

The Korean war is the first large-scale armed struggle between the eastern and western groups; it is the first and only anti-communism hot war that Britian and America both participated during the cold war.

朝鲜战争是冷战时期东西方两大阵营之间进行的第一次大规模的武装较量，而且也是英美之间在冷战期间所进行的第一次也是唯一一次共同参与的反对共产主义的热战。

One when it was the middle of the night, and the other was at sunset.

今年夏天我已经来海边两次了。第一次是在半夜，另一次是在黄昏。

For a long time after that everyone had called him the Champion and there had been a return match in the spring. But not much money was bet and he had won it quite easily since he had broken the confidence of the negro from Cienfuegos in the first match.

自从那件事情以后，有好长一段时间，人家都叫他「冠军」，第二年春天，他又比赛了一次，但这次人们下的赌注不大，他轻而易举地就赢了，因为在头一次比赛时，他就已经把西安弗荷斯来的黑鬼子的信心都击垮了。

A notably durable climber, whose stamina had been demonstrated again and again, Harding proved the perfect general to lead the assault on El Capitan.

Harding是一位坚毅的攀登者，一次又一次的证明，使其成为攻下El Capitan最完美的先锋。

This study shows that SHF provides an effective method to make premium products with complicated shapes or depth. In contrast to conventional methods such as stamping or drawing, SHF could make products with more complicated shapes through on stage forming, and the products also possess high surface quality. This experiment also shows that material selection and local corner radius design are very important, with proper design we could accordingly complete the forming through on stage.

本研究经由实验验证了板材液压成形技术提供了一项有效的方法来高制造具复杂度或具深度之高品质零件，相对於传统冲压或引伸方式，能够一次成形至更复杂造型成品，且制品具有高表面品质，但材料的选择与局部特徵R角设计仍扮演重要关键角色，需搭配设计适当之特徵R角，如此则能够以最具经济与效益的方式一次成形至所需成品。

What you owe is power--that is, exercise and expansion to your own latent capacity of sympathy with the infinite, where every pulse and each separate influx is step upward, a step ascending as upon a Jacob's ladder from earth to mysterious altitudes above the earth.

你应感激的是力量----即，让你行使并拓展自己能与无限产生共鸣的潜在力量，每一次脉动和每一次力量注入都将你平地提升一步，使你沿着雅各布的天梯从凡间向神秘莫测高处登高一步。

She took part of our overseas on-location shooting sessions a couple times in the past 2 years. I found out this attractive lady likes to sneak around behind our backs and shoot with an electronic viewfinder digital camera while we were working. I dispatched her a Nikon D40x DSLR with a professional grade super wide-angle zoom lens on a recent trip to Mindoro and Palawan (both are provinces of the Philippine), even though she is not a photographic assistant to me. Moreover, that camera body I gave her was just becoming available and right out of the box at that time. Yes, brand new stuff!

在过去的2年间她参与了我们数次的出国外景摄影工作我发现每当我们开始上工忙碌时这位可爱的小姐喜欢偷偷地走在我们的后面神不知鬼不觉地用小DC侧拍因此在最近一次的中程旅行摄影队开跋到闵多洛和巴拉望纵使她的职责并不是我的摄影助理我给了她一台Nikon D40x DSLR机身跟一支专业用的超级广角变焦镜头还有我给她的那款照相机机身那时是刚上市而且是刚开箱是的全新的发烧货！

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。