The authors conclude that spondylolysis is mainly the fatigue fracture due to locally increased stress and is contributing most by backward extension of lumbar spine.

This review describes antibacterial and antifungal natural products, semi-synthetic natural products and natural product derived compounds undergoing clinical evaluation or registration from 1998 to end of 2005.In addition, natural product derived drugs launched since 1998 are also discussed in this review.

本文将阐述从1998年到2005年底进行临床试验或注册的抗菌和抗真菌的天然产物、半合成天然产物及天然产物衍生物。此外从1998年起上市的天然产物衍生药物也将在本文中介绍。

Towards this end, in addition to advanced transmission techniques, some major modifications in the wireless network architecture itself are sought.

这不仅需要采用先进的传输技术，还需要新的网络架构支持。

With pulp board quality guaranteed, a portion of huge end eucalyptus is added in the 100% masson pine continuous cooking system. Effects are studied on hardness, b value, yield and strength merit of the pulp after huge end eucalyptus addition.

在不影响浆板质量的前提下，在原100%马尾松生产系统掺入部分巨尾桉，探讨了掺入巨尾桉后对纸浆硬度、b值、得率、强度指标的影响。

Study on Fiber Modification by Wet-end Addition of TDI-PEG 600

湿部添加分散型TDI-PEG600对纤维改性的研究

In this paper the linear induction motor model is given on the basis of equivalent circuit compensating the end effect. In addition, the concept and the method of constant slip frequency control of linear induction motor are analysed.

根据把端部效应考虑在内的等值电路，建立直线感应电机的数学模型，分析直线感应电机的恒转差频率控制的思想和实现方法，并对控制系统进行仿真。

The film stars went onto the stage according to priority of their appearance in the film.

影星们按照他们在影片中出现的先后顺序依次上台.

If you have some experience and careful observation can be seen on one of the questions.

如果具备一定的经验并且仔细观察就能够看出其中的问题.

Careful observation convinced them that is was so.

仔细的观察使他们相信情况是这样的.

The experiment needed careful observation.

这个实验需要细心观察.

Careful observation seriously analysis and scientific summary.

细心观察.认真分析. 科学总结.

The experiment is complicated and requires careful observation.

试验很复杂,需要仔细观察.

They were the result of years of careful observation.

翻译它们是常年细心观察的结果.

Scientists obtained those reactions of animals through careful observation and laboratory testing.

科学家通过对动物的认真观察或检测获得它们的这些情感反应.

And under careful observation, but also has some problems.

而仔细观察下, 也有一些问题.

I know all about the budget authorization, and I can count heads : you're one vote short.

我知道所有的预算授权书我可以心算出: 你只有弱弱的一票.

PLC and configuration software have been important tools of monitoring system.

可编程逻辑控制器PLC和组态软件已经成为现代工业控制中监控系统开发的主要工具，而组态软件的严格的通讯点数限制往往影响了其编程的灵活性。

Methods and skills of program for retrenching input points of PLC is introduced.

介绍了运用PLC的功能指令和编程元件，通过程序设计来节约PLC输入点数的方法和技巧。

The number of samples in the traditional synchronous sampling method is fixed in order to use FFT algorithm.

传统的同步采样法是将采样点数固定为N，这样可以使N为2的整数次幂以使用FFT算法进行谐波测量。

I if I go over here, and I say float of three, it's going to do the conversion.

用float来处理3，它将能完成装换，但是如果我吧这个转化为浮点数。

The optimization of the program design of the expansion of the effective number of I/ os of PLCs

PLC扩大输入有效点数的程序设计优化