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And what is the likelihood of it occurring?

发生的可能性有多大？

In order to effectively forecast or forewarn squall lines and verify the effectiveness of the nowcasting system,a squall line occurring on 1 August 2006 in Beijing is analyzed by using conventional weather data,automatic weather station data,Doppler radar data,and the nowcasting system.

为了对飑线这类强天气作有效的预报、预警，同时对临近预报系统的预报效果作初步的检验，利用常规气象资料、自动站资料、多普勒雷达资料，结合临近预报系统分析了2006年8月1日北京地区飑线天气过程。

We present the linear extrapolation which predicts the required optimum normalized fiber lengths for the optimum pulse compression experiments. Two of the most important nonlinear processes occurring in optical fiber are sefl phase modulation and stimulated Raman scattering .

我们从理论上首次分析了波破裂现象对光纤-光栅对激光脉冲压缩的影响，对以往的经验公式予以修正，给出了最佳脉冲压缩实验所要求的光纤长度的经验公式，以方便激光脉冲压缩实验中对光纤长度的选择要求。

Medium-small shrubby evergreen tree of western North America similar to the coast live oak but occurring chiefly in foothills of mountain ranges removed from the coast; an important part of the chaparral.

北美西部的一种常绿灌木状树，中小形，与禾叶栎相似，但主要生长在海岸不远山地的山脚下；形成矮栎林的重要组成部分。

The live program make it possible to see the occurring event far away.

直播节目使人们可以看到远方正在发生的事情。

Ferromagnetic materials include iron, nickel, cobalt, some rare earth metals and some 平共处 of their alloys(e.g., Alnico), and some naturally occurring minerals such as lodestone.

铁磁类的材料包括铁，镍，钴，一些稀有金属和他们的合金，还有一些天然的矿石，像磁铁矿。

One or both breasts become tender or painful and lumpy, and the symptoms occurring before and during menstruation.

一方或双方的乳房成为招标或痛苦和结节，症状发生之前和期间月经。

Lupus vulgaris is a chronic and progressive form of cutaneous tuberculosis occurring in individual with a moderate to high degree of immunity.

寻常性狼疮是一种缓慢进展的皮肤结核病，多发生在具有中度至高度免疫力的个体。

However, it should be noted that time is not a necessary distinguishing factor – macroevolution can happen without gradual compounding of small changes; whole-genome duplication can result in macroevolution occurring over a single generation - especially in plants.

但是，应该指出的是，时间不是一个必要的区分因素，宏进化可以在没有微小变化的渐进复合的情况下发生；全基因组的复制会导致宏进化在一代之中发生，尤其是发生在植物上。

Symbol Fe A silvery-white, lustrous, malleable, ductile, magnetic or magnetizable, metallic element occurring abundantly in combined forms, notably in hematite, limonite, magnetite, and taconite, and used alloyed in a wide range of important structural materials.

符号 Fe 铁：一种银白色的、有光泽、有韧性、可延展，有磁性或可被磁化的金属，以化合物形式大量存在，主要有赤铁矿、褐铁矿、磁铁矿和角岩，在许多种重要结构材料中用作合金的一种。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。