空出

When an attempt to access an object is made, and the reference to that object is null, a NullPointerException will be thrown.

当创建了一个试图访问一个对象和空对象的引用时，一个NullPointerException将被抛出。

Then he took away his mother's portrait , with its oaken frame, leaving the gilt frame from which he took it black and empty

他从镜框里拿出他母亲的画像，把它卷了起来，只留下那只镶金边的空框子。

SIGNED COMMERCIAL INVOICE IN OCTUPLICATE（SIX COPIES WITH ORIGINAL DOCUMENTS REMAINING COPIES WITH DUPLICATE DOCUMENTS）CERTIFYING MERCHANDISE TO BE OF CHINA ORIGIN QUOTING L/A NO 027018 AND BANGLADESH BANK REGISTRATION NO UNDER SEM DUPLICATE SET OF DOCUMENTS TO BE SENT BY SEPARATE AIRMAIL.

签署商业发票一式十份（六份随正本单据，余下随副本单据），证实货物产于中国，注明进口许可证号第027018，以及孟加拉银行在"SEM"项下的注册号，副本单据另以空邮寄出。

Dial consisting of two superimposed parts: the first "mirror" polished in white or pink gold and the second opaline silver-coloured with 12 and 6 o'clock cut-outs revealing two Roman numerals.

表盘为两层设计，底层是18K白金或粉红金打磨而成的"镜面"效果表盘，表层则为银乳白色表盘并于12时和6时饰以雕空罗马数字时标，巧妙的透出底盘效果。

This method can be applied to arbitrary Orthogonal Space Time Block Code scheme with TAS, and the generalized formula of SEP is also presented for Alamouti TAS scheme with imperfect feedback.

这种近似的方法适用于采用任意正交空时分组码的TAS系统，并且对于发送端选择两天线的系统还给出了SEP的显式表达式。

Finally, another feature extraction method based on orthogonal subspace of the samples is ...

本文给出的另一种特征提取方法，即基于样本正交子空。。。

Perhaps the market has been oversold by foreigners, who have sold shares to pay for losses elsewhere.

或许日本市场已经被外国人卖空了，他们大量卖出股票来填补其他地方的损失。

This machine is used for hardcover,book cover''''s paperhanging,tumbing box leading cover to binding equipment,holding in tow side paperboard,and tumbling box press the remain air.It makes cover smooth and beauty,the size can adjustby hand,work with single edge binding machine can finish the whole craft simply and quickly.

用途： 此机台针对精装书壳，文件夹、书面的装裱成型，其道动滚筒将封面引至包边装置，由包边装置将粉纸两边折入紧贴灰板纸，压轮及滚筒将空气压出，令封面平整、光滑、美观，尺寸大小由手轮任意调节，操作简捷，配用单边包边机，完成整个工艺。

In fact, as long as we ponder the same press Ctrl + H, and in the pop-up "Find and Replace" window, click the "Find Content", select the following "special character" button in the "Paragraph marks" twice (that is shown as ^ p ^ p), then in "replacement of the contents of" insert "paragraph marked"(appears as a ^ p), then the implementation of the replacement operator can delete the blank lines clean.

其实，我们只要动动脑筋，同样按下Ctrl+H，并在弹出的"查找和替换"窗口中点击"查找内容"处，选择下面的"特殊字符"钮中的"段落标记"两次，然后在"替换内容"中插入"段落标记"，然后执行替换操作即可把空行删除干净了。

In chapter 4, the case of risk asset allocation with allowed sell and restricted short sell is discussed, especially in case of restricted short sell, the efficient frontier piecewise partition is determined by using duality theory in parametric quadratic programming. And the concept of tripartition is introduced, economic meaning stated and algorithm to determine efficient frontier proposed.

特别对限制卖空的证券组合，应用参数二次规划对偶性理论解决了有效边缘曲线分片划分的问题，并引入了三元分割的概念，解释其经济意义，同时给出确定有效边缘的算法；对于协方差矩阵是奇异的情况，利用矩阵分块技术，得到不同情形下有效边缘的解析表达式，并用直观的几何图形描述，克服了M-V模型在实证分析中遇到的困难。

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。