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In our test, the mutation in S1 gene seemed notthe major reasons responsible for IBV tropism switch. 3: Relationship between HA activity and cross-species infection of IBV After treated with lecithinase C, the strains M41, H52, H120 and Gray, but notHolte, Connecticut and M52-19, could haemagglutinate 0.5% chicken erythrocytes.

唾液酸糖蛋白在IBV跨种感染过程中的作用某些冠状病毒可以利用细胞表面的唾液酸糖蛋白作为进入细胞的受体，而神经氨酸酶可以降解细胞表面的唾液酸糖蛋白，这样就会降低病毒感染的几率。

In the meantime, the application of optical switch and linearity scanning have been discussed in this paper.

同时，对光束控制在光开关、线性扫描等方面的应用做了相应的研究，此技术有广阔的应用前景。

In this way, the flow control states of the local terminal and the communication remote terminal are assured to be consistent, and the packet loss situation is avoided happening due to the disorder of the flow control state in the communication process between the local terminal and the communication remote terminal, thereby improving the work quality of the switch to a great degree and the stability of the system.

这样，便保证了本端与通信对端的流控状态的一致性，使本端和通信对端在通信过程中不会因流控状态的错乱而发生丢包现象，这在很大程度上提高了交换机的工作质量，也提高了系统的稳定性。

Secondly, viewing from the weakness in the conventional TPS descriptions and the configuration paths of the switch modules, a uniform matrix expression is used to present the logic relations of the multiple channels' connection modes in order to make TPS design more flexible. By this way, a new TPS design method is discussed so as to revise the test plans, adjust the channel configurations online, and improve the later exploration capacity of TPS.

其次，从分析以往测试程序集TPS在测试方案描述中的局限入手，在对各种通道开关模块的电气特性及配置路径进行归纳的基础上，设计了多开关模型的数学表达方法，将各类通道开关的连接方式纳入统一的逻辑表述范畴，以便于TPS软件的灵活设计；基于此，提出了一种适合测试人员根据测试需求修改测试方案，调整通道配置的方法，提高了TPS的二次开发能力。

The insulated rubber fittings for new high-pressure switch are three layers midheaven structure in which inside and outside layers are conductive rubber and the medium layer is insulated rubber,and metal parts are embeded in two positions.

新型高压开关体系所用橡胶绝缘体配件为三层中空结构，内、外层为导电橡胶，中间层为绝缘橡胶，有两处埋设金属件。

All bring their own wireless mouse driver disk, so as long as in accordance with instructions will be installed after the driver, when you start your computer in a wireless receiver to open the switch, and gently move the mouse, the system will detect the mouse, the user will be able to use the.

无线鼠标都自带驱动盘，所以只要根据使用说明将驱动程序装好后，在启动电脑时打开无线接收装置的开关，并轻轻地移动鼠标，系统就会检测到鼠标，用户就能正常使用了。

This section of crystal ball's base has a switch, after opening, the moon will be will shine, high 14cm, water polo diameter 10cm, will sway, in the water polo will have the colored paillette to flutter flashes, inside lovable small baby will be hugging young Xiong, happy lying down in the white clouds, on moon's cherub will be protecting her peacefully.

这 款水晶球的底部有个开关，打开后月亮是会发光，高14cm，水球直径10cm，摇晃的时候，水球里有彩色亮片就会飘扬闪动的，里面一个可爱的小baby搂著一只小熊，甜蜜的躺在白云上，月亮上的小天使安静地守护著她。

A new scheduling algorithm in Parallel Packet Switch is proposed in this paper .

摘要该文提出了一种新的并行分组交换网络调度算法。

The phase switches of the proposed SRM converter turn on in zero voltage switchingmode by making use of a kind of parallel quasi resonant DC link circuit,and turn off in ZVS mode by adding a shunt-wound capacitance to every phase switch.

电路采用并联型准谐振直流环节为SRM相开关开通提供零电压条件，给相开关并联电容器则保证了相开关的零电压关断。

Objective In order to observe the effect of Q-switch mulit-wavelength laser in treating dermal pigmental disease.

目的观察多波长Q开关激光治疗皮肤色素性病变的疗效。

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知，用混合偶联剂对滑石粉进行预处理后，滑石粉晶体结构发生改变，产生了插层现象，使PP／滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu'，这是夏威夷部长。