再发生

Objective: To observe the outcomes of radiofrequency ablation in patients with atrial tachyarrhythmia after circumferential pulmonary vein isolation, so as to discuss the related mechanism.

目的：观察心房颤动患者环肺静脉电隔离术后快速性房性心律失常的再消融治疗效果，并探讨其可能的发生机制。

Why? What happens to PX that it won't come back?

它不会再回来了，发生了何事呢？

Ina: Wouldn't it be better not to start the fire in the first place?Tom: But a fire would be fun to watch.Tina: My son, the pyromaniac.

om说这也可能，不过到时候如果真的发生火灾，他们再打电话叫消防队不就行了。

Its rapidsolidification behaviour during recalescence was studied by means of high speed cinematography andrapid infrared pyrometry,It is found that interface heterogeneous nucleation takes place in preferenceto homogeneous nucleation even at an undercooling above the previously accepted critical undercool-ing 0.2T_mfor homogeneous nucleatio...

采用高速摄影及快速红外测温技术研究了深过冷熔体的快速凝固行为。发现尽管过冷度超过了以往认为的均质形核临界过冷度0.2T_m，但是 Ni-32.5%Sn 共晶合金仍然优先发生界面异质形核，再辉过程中瞬时凝固速度最大可达784mm/s。

He says most of the risk of space flight occurs at launch and re-entry, no matter what the target.

他说，大多数宇宙飞船的危险性发生再发射以及返回的时候，与发射目标无关。

Perhaps the reactivation in these systems is simply not fast enough for this to occur.

或许这些实验系统中再激活作用只是还不够使其发生而已。

While undercooling at other temperatures, two or three events of recalescence may occur and the dendrite cluster may solidify.

其他过冷范围内的合金液则发生多次再辉和枝晶簇凝固。

After analysing the flight, cooling and undercooled solidification of multistage atomized droplets, this paper adopts Newtonial cooling, highly undercooled heterogeneous nucleation and steadystate continuous growth model to calculate and simulate numerically the thermal history of droplets and effect of main atomization process parameters during multistage atomization. The results indicated that large undercooling occur mainly during later stage of multistage atomization while recalescence and rapid quenching occur mainly during forced cooling stage.

在分析多级雾化过程雾化微滴的飞行冷却和过冷凝固特点及规律的基础上，本文采用了牛顿冷却、大过冷非均匀形核及稳态连续生长模型，对纯铝多级雾化过程中微滴热历史以及主要雾化工艺参数对其的影响作用进行了数值分析和计算，结果表明：大过冷主要是在多级雾化后期形成的，再辉和急冷则主要发生在强制冷却阶段。

But the species diversity has no significant correlation with the minimum distance to source area. This suggests that immigration and recolonization for Raniformes species have hardly occurred on Zhoushan archipelago after the islands were formed, and the species number on the islands is under the "non equilibrium" status.

但物种多样性与离物种源的最小距离没有显著相关性，这说明岛屿形成后蛙类在岛屿间很少发生迁移和再定居，物种数处于"非平衡"状态。

Article 98 Enterprises which must complete procedures for tax refunds in the case of overpayments of tax may, where income in foreign currency has already been converted into Renminbi according to the foreign exchange rate, convert the amount of the tax in Renminbi to be refunded into foreign currency according to the exchange rate in effect when the tax was originally paid, and then reconvert this amount of foreign currency into Renminbi according to the foreign exchange rate at the date of issuance of the tax refund certificate.

第九十八条企业所得为外国货币并已按照外汇牌价折合成人民币缴纳税款的，发生多缴税款需要办理退税时，可以将应退的人民币税款，按照原缴纳税款时的外汇牌价折合成外国货币，再将该外国货币数额按照填开退税凭证当日的外汇牌价折合成人民币退还税款

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。