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In a small number of influenzas, including all S-OIVs, the PB1-F2 ORF is truncated by termination codons at positions 12, 58 and 88, and its absence is associated with avirulence in mice.

在少数的流感，包括所有的S– OIVs，PB1 - F2 ORF在位置12，58和88被终止密码子截断，这种截断造成的缺乏与小鼠实验无毒性相关。

In a small number of influenzas, including all S-OIVs, the PB1-F2 ORF is truncated by termination cod** at positi** 12, 58 and 88, and its absence is associated with avirulence in mice.

在少数的流感，包括所有的S– OIVs，PB1 - F2 ORF在位置12，58和88被终止密码子截断，这种截断造成的缺乏与小鼠实验无毒性相关。

In a small number of influenzas, including all S-OIVs, the PB1-F2 ORF is truncated by termination codons at positions 12, 58 and 88, and its absence is associated with avirulence in mice.

目的是使猪源流感病毒对某些特定种族无毒，而对其它种族有毒？

The presence or absence of awns is useful for identification, but awned species may have awnless variants, and vice versa, and the position of the awn on the lemma back can also be rather variable.

存在或缺乏芒对鉴定有用

In the Presence of uncoupling reagents water stress had little effect on the photosynthetic electron transport in mesophyll cells of Iwpoea batatas, but in the absence of uncoupling reagents it promoted the electron transport and displayed pronounced uncoupling effect.

在有解偶联剂存在时，水分胁迫对叶肉细胞的光合电子传递没有影响，但在无解偶联剂存在下，水分胁迫促进了甘薯叶肉细胞的光合电子传递，表现出明显的解偶联效应。

There is an absence of research examining associations between food and beerage intake patterns and most research has centered on soft drinks, whereas research on oerall beerage patterns is absent.

在食物和饮料摄入结构联系方面的研究存在空白，多数的研究集中在软饮料，而在研究所有饮料摄入结构中仍然空白。

The old beggarman took advantage of Trevors absence to res t for a moment on a wooden seat that was behind him.

老乞丐趁着特里沃不在，坐在身后的木凳上休息了一会儿。

For any initial generalized bisymmetric matrix $X_1$, when $AXB=C$ is consistent, we can obtain the generalized bisymmetric solution of the matrix equation AXB=C within finite iterative steps by the iteration method in the absence of roundoff errors; Moreover, the least-norm solution $X^*$ can be obtained by choosing a special kind of initial generalized bisymmetric matrix.

在不考虑机器误差的情况下，当矩阵方程AXB=C相容时，对任意广义双对称X_1，矩阵方程AXB=C的解可以经过有限步迭代得到；特别地，通过选择特殊地初始广义双对称矩阵极小范数解X^*。

In their absence, there were fewer western voices to be heard preaching the virtues of a borderless world.

没有了银行家，西方鼓吹无国界世界之好处的声音就更小了。

Note the absence of surrounding edema; br indicates brachioradialis muscle; and o, olecranon process.

注意肿块周围没有水肿。br，肱桡肌；o，肘突。（缩略图，点击图片链接看原图

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。