等人

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran. Then, at the basis of Rao and Bayless's study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran.Then, at the basis of Rao and Baylesss study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法，它们的估计量、估计量的方差及其估计，其中包括有放回PPZ及PPS抽样，不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj，Murthy、Rao-Hartley-Cochran等人的方法；其次，在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上，将总体随机地分成两个子总体，视每个子总体取自不同的线性超总体，在文中，我们利用计算机实现随机分组，并通过画图比较各方法估计量的稳定性，结果表明，对变异系数C.V。

The use of the ratio between the migration length and the diameter of the comet head (LDR, see Tice et al., 2000) as a parameter to represent the data of the genotoxic effects in D. polymorpha was found (Bolognesi et al., 2004) to be able to reduce the inter-individual variability of the data (from 20–30% for TL to 5–10% for LDR).

使用的，两者的比例约为迁移长度和直径的彗星头（低剂量辐射，见泰斯对持不同等人， 2000年）作为参数，以代表该数据的遗传毒性效应四多形被发现（ bolognesi等人， 2004年）为了能够减少跨个别变异性数据（从20-30 ％铊，以5-10 ％的LDR ）。

Previously, Dr. Mahon and colleagues conducted a pilot study and explored the feasibility of discontinuing imatinib in CML patients who had experienced a complete molecular response. Of the 15 patients included in the cohort, 7 relapsed within 6 months, but they were able to reattain a complete molecular response after imatinib was restarted. The other 8 patients remain in remission after the discontinuation of imatinib (median follow-up is 37 months).

之前，Mahon医师等人主导一个先驱研究，探索完整分子生物学上缓解之CML病患停用imatinib的可能性，在总共15名病患中，7人在6个月内復发，但他们可以在再度使用imatinib之后再度达到完整分子生物学上缓解，其他8个病患在停用imatinib之后持续缓解(平均追踪期为37个月)。

Previously, Dr. Mahon and colleagues conducted a pilot study and explored the feasibility of discontinuing imatinib in CML patients who had experienced a complete molecular response. Of the 15 patients included in the cohort, 7 relapsed within 6 months, but they were able to reattain a complete molecular response after imatinib was restarted. The other 8 patients remain in remission after the discontinuation of imatinib (median follow-up is 37 months).

之前，Mahon医师等人主导一个先驱研究，探索完整分子生物学上缓解之CML病患停用imatinib的可能性，在总共15名病患中，7人在6个月内复发，但他们可以在再度使用imatinib之后再度达到完整分子生物学上缓解，其他8个病患在停用imatinib之后持续缓解(平均追踪期为37个月)。

Previously, Dr. Mahon and colleagues conducted a pilot study and explored the feasibility of discontinuing imatinib in CML patients who had experienced a complete molecular response. Of the 15 patients included in the cohort, 7 relapsed within 6 months, but they were able to reattain a complete molecular response after imatinib was restarted. The other 8 patients remain in remission after the discontinuation of imatinib (median follow-up is 37 months).

之前，Mahon医师等人主导一个先驱研究，探索完整分子生物学上缓解之CML病患停用imatinib的可能性，在总共15名病患中，7人在6个月内复发，但他们可以在再度使用imatinib之后再度达到完整分子生物学上缓解，其它8个病患在停用imatinib之后持续缓解(平均追踪期为37个月)。

Several important new observations that may provide answers to these vital questions are described by Rother et al in the present issue of Circulation.

Rother 等人报导的结果可能对这些生死攸关的问题提供了回答为了使本报告的审阅人能更准确地了解原文，我们也把这段原文附上。

The exception to this would be if the vocal folds are not stretched, as stretching of the vocal ligaments abducts the vocal processes

很多人都认为&海豚公主&张靓颖有海豚音，实际上并不是这样，她仅可以唱到小字三组，与mariah等人的小字七组就差得不只是一点半点了。

The exception to this would be if the vocal folds are not stretched, as stretching of the vocal ligaments abducts the vocal processes

很多人都认为&海豚公主&张靓颖有海豚音，实际上并不是这样，她仅可以唱到小字三组（据说F6，即f3，与mariah等人的小字四组（c4）确实还有一定差距。

I see a person who loathes lies, who does not like to be late for an appointment, and who, naturally, also does not like to have to wait for long.

我看到一个讨厌撒谎、不喜欢约会迟到、自然也不喜欢长时间等人的人。

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。