空出

A huge X-ray machine … to find out the empty soapboxes.

说明 X 光机器是用来找出空的肥皂盒的。

A large pear-cut crystal is the highlight. The open-back setting enhances its transparency.

大颗梨形切割水晶以背空包边镶嵌，强调出透明感。

A glut of repossessed houses dampens prices, and not just by adding to the supply of homes for sale. Thanks to high commodity prices, vacant homes in poorer neighbourhoods are quickly stripped of their aluminium sidings and copper fixtures. Marginal houses become uninhabitable; crime rises; whole areas are blighted.

回收房屋的积压拉低了房价，这不仅仅是因为增加了现有市场出售房的数量；由于基本商品的高价格，位于较穷区空屋的铝框和铜质装置很快就被拆去，原来勉强可住的屋子被拆至无法入住；不但犯罪增加，整个社区都被拖进泥潭。

A glut of repossessed houses dampens prices, and not just by adding to the supply of homes for sale. Thanks to high commodity prices, vacant homes in poorer neighbourhoods are quickly stripped of their aluminium sidings and copper fixtures. Marginal houses become uninhabitable; crime rises; whole areas are blighted.

回收房屋的积压影响了房价，还不只是增加了现有市场出售房的数量；由于基本商品的高价格，位于较穷区空屋的铝墙片和铜质装置很快就被拆去，原来勉强可住的屋子被拆至无法入住；不但犯罪增加，整个社区都被拖进泥潭。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

Cleaned out treasure to adopt systematic platoon to check to hitting fake, the three-layer measure that platoon of 24 hours of monitoring checks thousands of price database, volunteer, to the system platoon fish suspectable sells the home, group hair mail requirement examines self check oneself inside 24 hours, wu is sure to be suspected of violating the commodity of compasses to fall to wear or be deleted; If exceed the time limit is not carried out, the net that clean out treasure will forcibly clear empty processing, undertake possibly condemnatory.

淘宝对打击假货采取了系统排查、价格数据库、数千名志愿者24小时监控排查的三层措施，对系统排查出有嫌疑的卖家，群发邮件要求在24小时内自查自检，务必将涉嫌违规的商品下架或删除；如果逾期不执行，淘宝网将强行清空处理，并可能进行处罚。

The problem is that the modern woman is a prostitute who doesn't deliver the goods. Teasers are never pleasers; they greedily accept presents to seal a contract and then break it.

问题的关键在于，现代女性都是些不拿出真货色的妓女，她们都是调情高手，可从来都不能让我们满意；她们贪婪地索取礼物，给予承诺，然后又打破诺言，最后让我们人财两空。

Tom's excitement enabled him to keep awake until a pretty late hour, and he had good hopes of hearing Huck's "maow," and of having his treasure to astonish Becky and the picnickers with, next day; but he was disappointed. No signal came that night.

汤姆也激动得很晚才睡着，他怀着极大的希望等着听哈克的&猫&叫，好在第二天野餐时拿出财宝给贝基和参加野餐的人一个惊喜，可他的如意算盘落了空，令他失望的是那天晚上根本没有任何&猫&叫声传来。

The pair error probability performance in quasi-stationary fading MIMO channel and design rules for multiple quadrature amplitude modulation constellations are also analyzed.

提出一种结合低密度校验码和空时分组码的置信传播编码调制方案，并对其在准静态MIMO衰落信道下成叶差错概率及最优星座选择进行了分析，并给出了相应的参考设计准则。

Taking water-jacket of 226B diesel engine as the practical objective, the calculation in void fraction and the velocity filed of the water jacket were made.

最后以226B 型发动机水腔为工程应用对象，计算出了水腔内的空泡份额分布和水腔内的流度分布情况。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。