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Prior to the arrival of the import goods, the obligatory duty payer may file a declaration in advance upon approval of the customs.

进口货物到达前，纳税义务人经海关核准可以先行申报。

We hope we can fill up all of our positions prior to the event.

我们希望我们能够在活动之前确定我们的工作安排。

I'll still have some filler work to do prior to priming and painting.

我会仍然有一些填料的工作要做，之前启动和绘画。

The film maker visits Lomax one year prior to his death.

这部电影的作者在离罗马克斯去世的一年之前访问了他。

Based on the prior information obtained by qualitative inversion, the two stages inversion method was put forward. That is, the first stage is that distinguishing the high-quality element and non- high-quality element, and determining the initial iteration value of element sound velocity reasonably. The second stage is that treating differentially the constraint weights of the high-quality element and non- high-quality element, and then quantitatively inversing the final sound velocity distribution. The results of two concrete specimens indicate that the two stages inversion method can inhibit artifacts effectively and has better defect identification effect than normal one stage inversion.

在获取定性反演先验信息的基础上，提出了两阶段反演的方法：第一阶段，区分优质像元和非优质像元，合理确定像元声速的迭代初值；第二阶段，区别对待优质像元和非优质像元的约束权重，定量反演最终的速度分布。2个混凝土试件的模型试验表明，两阶段反演能有效抑制伪像，具有比常规的一阶段反演更好的缺陷识别效果。

We will finalize details of the training program prior to your arrival in New York.

我们将在您们抵达纽约前完成培训项目的最后细化工作。

Using a new measure function to express the sparse prior information of SAR image, a regularized model is established. The model is solved by the fixed point iteration method and proved to be convergent.

本文采用一种新的度量函数表示SAR图像的稀疏先验，建立正则化模型，证明了不动点迭代求解的收敛性。

Firstly, by constructing the Lyapunov function with a special structure, a prior estimate is obtained. Secondly, with the help of Green\'s function, the original problem is transformed into an equivalent operator equation, and the fixed point theory of contraction mapping in a Banach space guarantees the existence and uniqueness of the global solution.

首先，构造具有特殊结构的Lyapunov函数，得到解的先验估计；其次，借助Green函数将原方程等价变换成算子方程，Banach压缩映射的不动点定理保证了全局解的存在唯一性；最后通过常微分方程的定解，证明了主要结论，即平凡解全局渐近稳定。

Q: While a player is preparing to play from near the putting green, his opponent or fellow-competitor attends the flagstick without the player's authority or prior knowledge.

问：当一名球员在果岭附近准备打球时，他在比洞赛中的对手或比杆赛中的同组球员未经他的许可或预先通知就自行照管旗杆。

Therefore, prior to performing any quantitative experiments, it was decided to do a flame test .

因此，之前从事任何定量试验，这是决定这样做火焰的考验。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。