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This kind of problem frequently crops up.

这类问题是经常发生的。

But the phenomenon that crudity cabbage bolting happened frequently because climate was abnormal and cultivating patterns changed.

甘蓝是一种世界性蔬菜，由于其具有适应性广，耐寒性强和一定的耐热性等特点，因此在引入我国后发展很快，分布也很广。

Cruller: Potassium alum which found in Cruller is a type of non-organic aluminum substance, may not be eaten frequently.

8油条：油条中的明矾，是含铝的无机物，不可经常食用。

Cruller : In the cruller pota ium alum , is contai the aluminum the inorganic su tance , may not frequently edible .

油条：油条中的明矾，是含铝的无机物，不可经常食用。

In Washington, he wept in public so frequently that Clinton calls him our first crybaby president.

在华盛顿，他这么经常在公共场合哭泣以致克林顿把他称为我们的第一位爱哭的总统。

As a variant of differential cryptanalysis, impossible differential cryptanalysis is a simple and effective technique, and it is also one of the most frequently used cryptanalytic methods.

不可能差分分析作为差分分析的一种变体，是一种简单有效的密码分析方法，也是目前最常用的密码分析方法之一。

Objective To investigate the resistance of Culex tritaeniorhynchus to insecticides used frequently in high incidence areas of Japanese encephalitis in Shaanxi province.

目的 了解陕西省流行性乙型脑炎高发区三带喙库蚊对常用杀虫剂的抗药性水平。

It presents a relatively detailed description of th e epidemic condition, of viral diseases of fishes,method of their prevention,con trol and treatment; the characteristic of pathogens;variation of hosts;and the h istopathological features.It aims to make the culturist realize that viral disea ses have broken out frequently in the world, and pay more attention to it.

摘 要 综述了中国台湾地区及世界其他主要海水养殖国家和地区的养殖鱼类病毒性疾病的流行情况、防治方法、病原特征、宿主范围和组织病理学特征，目的在于让养殖者了解鱼类病毒病已在世界范围内频发，希望能引起各方面的重视。

I am now frequently astounded by human beings' cupidity to amass fortune at the cost of conscience.

我经常被人类以良心为代价敛财的贪婪心理所震惊。

Another frequently voiced complaint is that he has failed to get a grip on the Roman Curia, the central administration of the church.

另一个经常听到的抱怨，是他未能掌握罗马教廷和教会的中央行政管理职权。

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。