主要原因

The magnitude of pseudo-Zernike moments has rotational invariant property.

目前 ，伪 Zernike矩没有得到广泛的应用，其中的一个主要原因是，它不具备真正意义上的比例不变性。

Invasion and metastasis is the most important cause of cancer mortality.

癌的侵袭和转移是引起癌症病人死亡的主要原因。

The aluminium pick up of stem in extrusion is one of the causes of inwall defects of the extruded aluminium alloy pipe.

穿孔针粘铝是造成铝合金管材挤压时产生内表面擦伤缺陷的主要原因之一。

The main reason for the freeze is to save the Iraqi blood," he said."This is our goal.

停火的主要原因是为了避免伊拉克人再流血"，他说，"这是我们的目标。

He said."What is holding the UK and the USA back is the irregular spelling system."

他说："不规范的拼写系统是造成这一问题的主要原因。"

In most cases, low water pressure is the main reason for irrigation problems.

在大多数情况下，低水压是灌溉问题的主要原因。

The experimental results showed that the catalytic activity for the polymerization of isoprene is dominated by the rate constant of absolute propagation in this system.

研究结果表明：该体系催化活性低的主要原因是其绝对增长速度常数太低。

It is assumed that the main causes of the disease are developmental efect of the lumbar spine isthmus and trauma.

我们认为峡部发育细小和外伤的作用是发生峡部裂的主要原因。

Such is the irrelevance of the Republicans in the House of Representatives, however, that their efforts to block the Democrats' juggernaut are not one of them. They unveiled a rival health plan this week that would cost less, allow inter-state competition and reform malpractice insurance—but it would also cover far fewer people and it fails to restrict jiggery-pokery by insurers.

如众议院共和党代表们的不配合，虽然这并不是主要原因，但不管怎样，众议院的共和党代表们正在尽力阻止民主党在众议院的主宰地位，他们同样在本周推出了一份预算较低的提案，这份议案允许洲与洲之间的竞争，并改革了医疗事故保险，但是同样这份议案将惠及更少的人，而对于保险公司的欺诈行为的监管也不是很严格。

The results showed that the fracture toughness of the weld of HFW pipe was lowest.The value of absorbed energy of HFW weld was closely related to the heat treatment process.But the fracture toughness of fusion zone of submerged-arc welded jointer,its microstructure was coarse granular bainite,and was lower than the other locations of heat affected zone;and with the increasing of steel strength,the effect of welding heat cycles on the pipeline steel became stronger,and form coarse microstructure in fusion zone leading to decrease fracture toughness.

结果表明，高钢级管线钢高频焊接焊缝处的断裂韧性最低，其冲击功大小与热处理工艺密切相关；而埋弧焊接热影响区断裂韧性在熔合线处最低，其主要原因是此处的组织为粗大的粒状贝氏体，而且强度越高焊接热循环对管线钢的作用越强，在熔合线附近更容易产生粗大组织，使断裂韧性降低。

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。