The research and application of 4G are also in a positive process.

Possible Topology Architectures of 4G Radio Access Network

4G无线接入网拓扑结构展望

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Therefore, OFDM has been a support technique in the 4G wideband wireless communication systems.

因此，OFDM已成为未来高速无线通信系统4G的支撑技术。

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Study on Key Techniques in 4G

4G中的关键技术

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Smart Antenna Experiments for 3G and 4G Cellular Systems 3

3G和4G蜂窝系统智能天线测试

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The US is a big market and offers growth as it spends on 4G.

美国是一个大市场，美国运营商的4g网络支出带来了增长机会。

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Research on the Scheme of Authentication and Key Distribution Scheme under the Environment of 4G

4G环境下身份验证与密钥分配方案的研究

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A 4G version for China Mobile will be available in September.

中国移动（China Mobile）4G版要到9月份才能推出。

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Discussion on Transition Strategy from 3G to 4G

3G向4G过渡策略探讨

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Link Budget and Networking Analysis of FuTURE 4G TDD Trial System

FuTURE4G TDD试验系统链路预算与组网分析

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Generally, the next generation mobile communication systems are called B3G or 4G systems.

人们一般把下一代移动通信技术统称为B3G或者4G。

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You cannot provide the correct medicine without the proper diagnosis.

若不作出正确诊断，就无法对症下药。

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The rating agency said that as investors grow more risk averse, Italy currently rated aa2, the second-highest rating may be unable to sell bonds without offering higher interest rates.

穆迪表示，随着投资者日益回避风险，当前评级Aa2（为第二高评级）的意大利若不提高利率，国债可能就会卖不出去。

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It was concluded that the fixation alkali SH is a very good replacer for traditional soda, whose applied amount is only 1/ 8~ 1/ 10 of soda.

若不考虑可燃性，R1270可考虑作为R502的优良替代制冷剂。固色碱SH完全可以替代纯碱固色，其用量仅为纯碱的1/8～1/10。

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For example, as heat expansion coefficient of SLA prototypes from acrylic epoxy resin is usually larger than that of the mould in the course of sintering, mould cracks often occur without some technical measures so that we can't pour liquid metal.

例如，SLA系统制作的丙烯酸环氧树脂原型存在焙烧过程中膨胀系数大于铸型的膨胀系数，若不采取一定的工艺措施，往往会使铸型开裂，而无法浇注金属液；

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When driving a DC Motor, Buck converter which adopts current close-loop tracking control will result in serious current overshoot easily if there is no effectual measure to be taken, and then the current stress of switches is high.

Buck变换器驱动直流电机时，在电流闭环调节过程中，若不采取有效措施，将容易产生过大的电流超调，使得开关管的电流应力过大。

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Without support for the function, added records are not visible and you must call requery to see them.

若不支持该函数，则已添加记录不可见，必须调用requery才能看到它们。

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For WAP ordering, the system parses the RADIUS protocol and compares it with before and after order packets which go through the WAP gateway, and if inconsistent, it is malicious order.

对于WAP订购，系统解析RADIUS协议并与经过WAP网关前后的订购报文信息进行比对，若不一致则判定其为恶意订购。

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Coal is the largest source of energy in China. However, most coal was combusted without cleaning, which would emit a large amount of SO2 to atmosphere if not post-processed.

我国能源主要以煤为主，且大部分煤未经洗脱便直接进行燃烧，若不进行后处理则会向空气中排放大量SO2。

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Sn has obvious effect on aging process of Al-Si-Mg alloy. Sn can decrease the strength of the alloy as inclusions, if under no ageing process.

Sn对Al-Si-Mg系合金的时效过程产生明显的影响，合金中加入Sn，若不进行时效处理，Sn作为夹杂降低合金的力学性能；

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The third parameter of the LinkedHashMap() constructor must be true to use the access-order for the map's entries instead of the default order.

若不想使用默认顺序，LinkedHashMap（）构造函数的第三个参数必须是true以便使用条目的访问顺序。

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