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This authoritative and engaging text, which is designed to be covered in a two-semester course, was written with a thoroughgoing commitment to the needs and interests of life science students.

这个权威性和从事文本，目的是要在两个学期的课程覆盖，写的是一个彻底的承诺的需要和生命科学学生的利益。

The mass transter can be enhanced ,when we introduce sulfuric acid and cuprous oxide into this system.The model is formed to describe the transference of the martial between the four phases: gas-liquid-liquid-gas, which can explain some problems. We analyze the dead of the catalyst, and make a conclusion that the surface of the catalyst is covered with some compounds such as bluestone, which lessen the activity points of the catalyst and debase the activity.

在SO_4~(2-)／ZrO_2-La_2O_3催化的反应系统中加入稀硫酸和氧化亚铜促进了异丁烯和一氧化碳的传质、使反应得以快速，高选择性的进行，异丁烯的转化率达95％以上，特戊酸的收率达47％；讨论了g-l-l-s传质过程；对催化剂作了失活分析，催化剂失活的原因是因为反应后的催化剂表面覆盖了一层硫酸盐，使催化剂的活性中心数减少，活性降低。

The vast Qarhan Salt Lake covered with a hard salt layer was undulant like the ocean waves from far distance, the salt from it could be supplied to the people of all the country for more than 60,000 years.

那个察尔汉盐湖，十分广阔，湖面上结着硬硬的盐盖，远看起伏不断，像大海的波浪。它的盐可以供全国人民吃6万多年。

Using the DG index to measure the diversity of soil invertebrate assemblages was more reasonable than Shannon-Wiener Diversity Index in this case because the Acarina predominated in the samples which covered up the information of other soil invertebrate taxa, while the DG index is proposed on base of the hypothesis that every species has equal independence and importance in the community and could be compared with inter-community.

在本研究中，应用密度类群指数分析土壤无脊椎动物多样性的结果比应用Shannon-Wiener多样性指数的结果更为理想，这是因为土壤无脊椎动物由于组成结构复杂，不同类群的个体数量往往存在着巨大的差异，例如蜱螨目的较大数量常掩盖了其它类群的重要信息，多样性指数不能体现这一情况，而密度类群指数是基于各物种在群落中都有同等独立性，宜在不同群落间进行同种类比较的假设，对于复杂的土壤节肢动物群落多样性的测定可获得比较贴切的结果。

On cystoscopic examination, an external compression mass covered with normal bladder mucosa could be seen at the right lateral wall.

核磁共振扫瞄发现在膀胱的右侧有一管腔内的圆形肿瘤，疑似壁内的神经的或间叶的肿瘤。

Monstera see, I was reminded of a story, Once upon a time, there is a small turtle, and its body covered with wounds, suffering and crawling on all fours, well-intentioned old lady adopted it, but at home there is nothing small turtle feeding, therefore, the home can be sold are sold to the little turtle to eat for a month, the furniture at home has left a few on at this time, little turtle died.

看到龟背竹，我想起了一个传说，从前，有一只小乌龟，它的身上布满了伤，痛苦地爬着，好心的老婆婆收养了它，可是家里没有东西喂给小乌龟，于是，把家里可以卖的都卖了，给小乌龟吃了一个月，家里已剩下的家具寥寥无几了，就在这时，小乌龟死了。

Despite its flimsiness , Tempel 1 has an almost planetlike surface, covered with what appear to be impact craters (the first ever observed on a comet), cliffs, and distinct layers.

除了结构松散之外，谭普一号有著近乎行星般的表面，其上满布著像是冲撞后所留下的坑洞（这在彗星上是首次被观察到）、断崖和多层次结构。

On the other hand, from the point of view of work manner, thedetecting systems can be classified two kinds: the active and the passive systems. Althoughthe passive detecting system can\'t get so much information as the active one, it has itsspecial characteristic. For instance, the passive system is immune to the radar clutter. It issecreting and has no electromagnetic pollution due to none of radialization. The passivesystem also has excellent capability of detecting the target covered with the stealth material.

从工作方式来看，探测系统还可分为主动和被动两种方式，虽然主动工作方式可以获得关于目标的更多信息，但是被动工作方式也有其不可替代的特性，如不受闪烁效应的影响；由于本身不发射电磁波，因而没有电磁污染及工作比较隐密；对覆盖吸波材料的目标探测能力很强等。

The skull should be long and of medium width, slightly domed and covered with short, hard hair.

头颅应该比较长，中等宽度，略拱且头顶较短，毛发很硬。

Purpose: 1.0x0.4cm laminectomies were performed in 8 healthy adult rabbits at L3 and L5. One of the defeats was left alone as control,the other defect was covered with Fibrin Glue.The FG was polymerized to be stable membrane after 3-5 minites. The animals were sacrificed in 4 weeks after the operation.

目的：本实验选用健康成年白兔8只，在L3、L5部位切除椎板形成两处1.0X0.4cm缺损，一缺损作为空白对照，另一缺损在硬膜外喷洒医用生物蛋白胶（Fibrin Glue，简称FG），FG于3-5分钟后聚合成为稳定的薄膜覆盖于硬脊膜上。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失