交替地

Why do we persist in the same contradictory behavior day after day, century after century, alternating between Chartres and the Crusades, between grief and gore, between moonwalks and megatons?

为什么我们日复一日，一个世纪又一个世纪地坚持同样矛盾的行为？交替往返于 Chartres 大教堂和十字军东征，于悲痛和冲突流血，于月上行走和曼哈顿工程。

Continuously reciprocating piston movement, the water pump and water pressure on the continuous process of alternating.

活塞不断往复运动，泵的吸水与压水过程就连续不断地交替进行。

And the strengthening mechanism can be described as follows: WC cemented carbides have interlaced short-clubbed grain, and in the bend strength test, the microcrack generates at WC/WC grain boundary, and may be blocked by interlaced fine-clubbed grains during extending, which induce the intergranular pulling-out. Due to the pulling-out mechanism, fracture-extend energy is greatly expended, thus bend strength is increased. The wear mechanism is groove wear and spalling of WC grains.

热机械合金化合成的WC-Co硬质合金比传统方法制备的同类WC合金具有更高的强度，其机理是：热机械合金化合成的WC合金具有交替排列的短棒状组织，在三点弯曲试验中，微裂纹萌生于WC/WC晶界位置，受到交错排列的短棒状晶粒的阻碍，裂纹扩展以短棒状晶粒的拔出方式进行，极大地消耗了裂纹扩展的能量，从而提高了弯曲强度；合成试样的摩擦磨损过程以犁沟磨损和WC颗粒的剥落为主要特征。

In this paper,the methodology which combines excitation-exmission matrix fluorescence spectra with second-order calibration based on self-weighted alternating normalized residue fitting algorithm and parallel factor analysis was applied to simultaneously and directly determine dextromethorphan and dextrorphan content in plasma samples.

本文通过激发发射矩阵荧光法获得三维数据，结合计量学中的自加权交替归一残差拟合算法和平行因子分析算法，利用二阶校正方法具有的&二阶优势&，可很好地解决这一难题，获得了满意的结果。

Just because contemporary university students are in the improving period of the social system alternate, and are also facing the in-depth reformation of the university educational system. Especially the reformation related to university student's vital interests becomes gradually deepening, makes their environments increasingly complicated and various. Talent competition is fierce day by day, the pressures from study, economy, employment, emotion increased generally, and university students' age characteristics, cognitive level, growing environment and limitation of the growing experience exist, these factors cause them unavoidably to suffer various setback tests. University students are in front of a great deal of contradictions and conflicts such as thought and reality, independence and dependence, self-humiliation and self-respect, freedom and discipline, in this case they usually have weak psychological endurance and weak setback resistance.

正是由于当代大学生处于社会新旧体制交替的变革时期，又面临着高校教育体制改革深化，特别是涉及大学生切身利益的各项改革的逐步深入，大学生所面临的各种环境日益复杂多样，人才竞争日益激烈，来自学习、经济、就业、情感等方面的压力普遍增大，加之大学生的年龄特征，认知水平，社会生长环境以及成长经验的局限，导致他们不可避免地要遭受各种挫折的考验，他们在理想与现实、独立与依赖、自尊与自卑、自由与纪律等诸多矛盾和冲突面前，往往表现得心理承受能力弱，耐挫折能力差的弱点。

The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D=1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D=2.0 is replicated properly by the simulation results.

计算模拟结果很好地重现了刚性单列圆柱在小间隙比(1.5)下以宽、窄尾涡交替和多频为特征的非均匀流态，以及间隙比为2.0时的涡脱落现象。

The moral of the story is: Since the time of our birth, tribulation has been chasing us like a hungry tiger and death has been waiting like a fierce lion at the bottom of a cliff. And the alternation of day and night is like a black rat and a white rat who keep biting into the tree of our lives.

这个故事的寓意是：从我们诞生的那一刻开始，苦难，就像饥饿的老虎一直追赶着我们；死亡，就像一头凶猛的狮子，一直在悬崖的尽头等待；而白天和黑夜的交替，就像一黑一白两只老鼠，不停地咬着我们暂时栖身的生活之树。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失