交替

The results were as following. Compared with C, total irrigation water amount for A and F decreased by 26.27% and 21.20%, irrespectively, the yield decreased slightly while water use efficiency and production efficiency of irrigation water increased markedly, which of A increased by 29.21% and 16.84%.

结果表明，半边固定灌溉和两边交替灌溉的总灌水量比均匀灌溉分别减少26.27%和21.20%，其产量仅略微下降，水分利用效率和灌溉水生产效率明显增加，其中，交替灌溉分别增加29.21%和16.84%。

Objectives: We attempt to determine if obstructive sleep apnea leads to higher incidence of positive microvolt T-wave alternan; thus higher risk for arrhythmic death; and correlate MTWA result with severity of OSA as measured by apnea hypopnea index.

目的：我们研究阻塞性睡眠呼吸暂停综合症是否导致阳性微伏级T波电交替发生率增加从而使得致死性心律失常发生的风险增加；由呼吸暂停低通气指数确定的严重睡眠呼吸暂停综合征是否与微伏级T波电交替相关。

The results showed that,the sound pressure level increased significantly when narrow transverse groove was used;the effect of speed on the sound pressure level was greater than loading;the noise of S-shaped straight groove was lower,and the difference of sound pressure level between positive and negative rotation was small;the sound pressure level of 15° oblique groove was higher than 0° and 15° alternate groove,but the difference of sound pressure level between positive and negative rotation of 0° and 15° alternate groove was bigger.

结果表明，无论加刻什么类型的横向细沟槽，声压级都大幅升高；速度对声压级的影响程度大于负荷；在3种类型的横向细沟槽中，S形直沟槽噪声较小，且正、反转时声压级差异小；15°斜沟槽声压级较0°与15°交替排列沟槽略高，但0°与15°交替排列沟槽的正转和反转声压级差异较大。关键词：轮胎；轮胎噪声；胎面花纹；横向细沟槽中图分类号：TQ336.1；TB533+。2文献标识码：B文章编号：1006-8171(2009)

Based on an analysis of the mechanism of flow pattern alternation, approximate criterion for flow pattern alternation was formulated, and a numerical model was worked out for simulation of free overfall and submerged overfall alternation by combination of the above two models.

分析两种不同水流形态的交替机理，建立两种水流的转换条件，联立两种不同形态的数学模型构成保水堰的堰流和满流交替的非恒定流数学模型。

Its red refulgence spread out towards the vault of heaven , lifting the night sky higher and yet higher, and incarnadining it in turn.

这是晨光与黑夜交替的时刻，这是即将过去的世界与即将到来的世界交替的时刻。

This paper introduces a cardiopulmonary resuscitator using alternating compresson of chest and belly,which is used in clinic rescue when heartbeat or respiration of the patient stops abruptly.

胸腹交替按压心肺复苏装置的研制中国医学科学院生物医学工和研究所李永江，段炳柱中国协和医科大学生物医学工和研究所范振英（300192）［提要］本文介绍一种用于心脏、呼吸骤停时进行抢救的胸腹交替按压心肺复苏医疗装置。

The thesis proceeds to discuss constraints required in accounting for the retroflex suffix-induced stem alternation and concludes that the complexities in stem alternation result from the interaction of the following constraints.

作为对输出项形式和相关条件的概括，导致词干交替的成因和导致交替发生的各种音系过程可以用制约条件这一形式化方式加以表述。

To all project practicality, the introduction is given to the operational characteristics, the methods for calculation and the researching actuality of the tail tunnels with sloping ceiling underground hydropower stations the Three Gorges. This paper has discussed in detail the characteristic method being the same with the compressive flow and the Priessmann solution being the same with the free-surface-pressure flow. And how to deal with boundary conditions has been expatiated. Also hydraulic transient process of tremendous load fluctuation in the tail tunnels with sloping ceiling has been numerical simulated and the Fortran program for numerical simulation has been given. The paper gain the maximal press for tail end of the shell, the maximal rising rate of rotational speed of generating set, the maximal vacuum degree for inlet of the tail tunnels and so on under 11 kinds conditions of tremendous load fluctuation. These conditions include the design conditions, the check conditions and the superposition conditions. Finally, the computing results have been analyzed and summarized. The end chapter is the general comment of the whole-length content and the describing of the intending view of researching.

本文以三峡右岸地下电站尾水洞设计为背景，从工程实际出发，阐述了变顶高尾水洞的工作特性、使用范围及其研究现状；详细论述了适用有压流的特征线法、适用明满交替流的普里斯曼解法等数学模型；边界条件的给定和明满交替流的计算方法；用Fonran语言编制了数值计算程序，对三峡右岸地下电站变顶高尾水洞的大波动工况进行了数值模拟，分别得出了在设计工况、校核工况和叠加工况下蜗壳末端最大压力上升值、机组最大转速上升值和尾水管进口最大真空度等重要参数；对数值计算结果进行了详细分析并得出了有价值的结论；最后展望了今后水电站变顶高尾水洞的研究方向。

Which are divided into sporophyte developed special-shaped generational and generational shaped gametophytes developed.

其中又分为孢子体发达的异形世代交替和配子体发达的异形世代交替。

In tailrace tunnels of large hydropower station, a transient mixed free-surface-pressure flow may occur, which has a complex effect on the stability and transient of the power plant.

大型水电工程的尾水隧洞中可能会发生明满交替流动，给电站过渡过程带来很大影响，需要建立合理可行的明满交替流动数值计算模型。

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