查询词典 prevent changes

The temperature rising mechanisms of manganese carbonate fines containing coal by microwave heating were discussed. The results show that, manganese carbonate fines containing coal have good characteristics of microwave heating and self-reduction. At the molar ratios of C atom to O atom as 1.1, 1.2 and 1.3 in the mixed materials, the averaged maximum temperature-rising rate of the mixed materials by microwave heating is 140.7 K/min at 1 473 K with the microwave frequency of 2.450 GHz. At the different containing coal ratios and heating temperatures, the value of the dielectric constant is big, 5.5, but that of the permeability is about 1, so the mixed materials belong to dielectric loss. The temperature rising performance depends chiefly upon the electromagnetic performance of materials, whose change is caused primarily by the chemical reaction, the changes of crystal structural , and the changes of defects state. The bigger the containing coal ratio, the better the absorptivity of microwave. At the same containing coal ratio, the higher the heating temperature, the weaker the absorptivity of microwave.

研究结果表明：含碳碳酸锰矿粉具有优良的微波加热特性和自还原性；在微波加热频率为2.450 GHz、碳氧原子摩尔比分别为1.1，1.2和1.3时，微波加热混合物料至1 473 K的升温速率平均最高达到140.7 K/min；不同的加热温度和配碳比下混合物料的介电常数较大，都在5.5左右，而磁导率为1左右，属介电损耗型；微波加热含碳碳酸锰矿粉的升温性能主要取决于含碳碳酸锰矿粉的电磁性能，而电磁性能的改变主要是由物料加热过程中产生的化学反应、晶体结构变化及缺陷状态的改变引起的；配碳比提高，物料吸收微波的能力有所提高；在相同的配碳比下，加热温度升高，吸收微波的能力有所减弱。

Thereafter, people use "the sea turned into a mulberry field" to show the great changes are seen in the course of time, or swift changes of the world.

此后，人们使用&海变成了桑田&，以显示了很大变化，被认为是在这个过程中的时间，或迅速变化的世界。

The swift changes of the world;great changes are seen in the course of time;the evanescence of the worldly affairs is like the sea turned into a mulberry field.

大海变成了种桑树的田地，种桑树的田地变成了大海。比喻世事多变，人生无常；或喻世事变化的巨大迅速——略称沧桑

Thereafter, people use "the sea turned into a mulberry field" to show the great changes are seen in the course of time, or swift changes of the world.

后来人们用&沧海桑田&，比喻人世间事物变迁极大，或者变化极快。&沧海桑田&也简作&沧桑&。

When microinjection of medicine into VLNTS induced the changes o f activity of respiratory center, the effects of laser irradiation of "chest and lung area" on these changes were observed.

记录膈神经放电，于延髓孤束核腹外侧区微量注射药物，改变呼吸中枢的活动，观察激光照射耳廓&胸肺区&对这些活动改变的影响。

Objective:To study the radiation-induced changes of carcinoma lesion and non-tumor tissues and organs of pelvis in patients with cervical canner on magnetic resonance imaging during and after radiation therapy. Methods:pelvic MR imaging was performed in 36 patients with cervical carcinoma before, during, and after radiation therapy. The size and signal changes of carcinoma lesions and pelvic soft tissues were observed on MR images.

目的：分析宫颈癌放射治疗中与放疗后肿瘤与盆腔非肿瘤软组织的MRI改变方法：36例经病理证实的宫颈癌患者在放射治疗、中、和治疗后不同时间阶段行盆腔的MRI成像，并观察肿瘤及盆腔软组织器官在放疗前后的小或信号改变。

The changes of state and community relations will inevitably lead to changes in the morphology of government.

国家与社会关系是理解政治生活的&双螺旋图&[1]36-38。国家与社会关系的变化必然导致政府形态的变迁。

Once you've made the choice and commitment; it's time to 'start the ball rolling' with one or two changes, changes in your attitude.

一旦你的选择和承诺，是时候'开始与一个或两个变化，你的态度改变了球滚动'。

Water stress can cause changes of synthesis of protein, and the changes of protein components of different drought-resistant cultivars was same.

水分胁迫可以引起蛋白质合成的变化，不同抗旱性品种发生变化的蛋白质大小有部分是相似的，也有许多是不同的。

Lunar month, is a revolution, when the moon relative to the sun's position changes, resulting in a new moon, winding, hope and the last quarter moon phase changes.

朔望月，是以月球公转时相对于太阳位置的变化，产生了朔、上弦、望和下弦的月相变化。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！