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Higher algebra is an abstract and theoretical subject.In the teaching,it is hard to join the examples with the real life.This gives people the impression that learning algebra is not useful.

高等代数是一门抽象性和理论性较强的学科，在教学中所涉及的例子较少能与实际生活密切相连，让人感觉到学习的内容与生产实践脱节，体现不了数学的应用价值。

Because the olefinic hydroxyl groups are linked with olefinic carbon, so it can ionize H〓 ion and present the properties of weak acid, and so the olefinic hydroxyl groups change into the structure of alcoholate in the presence of alkali , but the structure of alcoholate may change into the structure of olefine alcohol again, after the Na〓 ions is removed, or when the pH value of its solution turn into pH. Because the structure of the olefine alcohol is not stable and is easy to isomerizate to become the structure of olefine ketone, so there appear the ca. 1730cm〓 C=O absorption peak in the IR spectra of the products.

明确指出了在C〓、C〓富勒醇中存在烯碳羟基与叔碳羟基等二类羟基，烯碳羟基由于与一个共轭体系相连，从而其羟基可以离解而呈现出弱酸的性质，因而在碱性条件下易形成烯醇钠盐的结构，当除去钠离子后或在酸性溶液中，烯醇钠盐结构转变为烯醇结构，但由于烯醇结构不如烯酮结构稳定，从而形成烯醇结构后，烯醇结构异构化为烯酮结构，因此在其产物的IR谱图上出现1730cm〓附近的C=0吸收信号。

Use thumb tacks to pin these two brackets to the wood block. Make sure the magnet will fit easily between the brackets and connect the two battery wires as shown (make sure the plastic is removed from each end of the battery wires).

用按钉将这二个作好的铝片固定在木块上，确认环型磁铁在铝片中间的合适位置，之后再将从电池过来的2跟导线与铝片相连。

Other architects have been attempting to create a specifically Asian vision of the skyscraper typology.The most famous is by the architect of London's One Canada Square. Cesar Pelli's stainless steel-clad Petronas Towers, which nodded elegantly to Malaysia's hybrid Islamic and East Asian aesthetics.

在北京城的那一边，美国设计师斯蒂文·霍尔正在建设一个拥有8座塔楼的完整社区，可容纳2500人，每座建筑都有连廊彼此相连，形成一个集居住和休闲于一体的综合性社区。

Is the first 3D polyoxomolybdates supramolecular architecture with nicotinic acid ligands.

化合物 8 是一个三维的超分子网络结构的钼氧簇，它的特点是烟酸首次作为配体与钼氧簇相连。

The population of Greenland is predominantlyInuit, a people bearingan affinityand solidaritywith the Inuits of Canada, Alaska and Siberia.

生活在格陵兰的人被称作&因纽特人&（就是我们现在常说的Eskimo爱斯基摩人），与加拿大、阿拉斯加、西伯利亚的因纽特人血脉相连。

"Each consists of a molecule of a five-carbon sugar (ribose in RNA, deoxyribose in DNA) and a nitrogen-containing base, either a purine or a pyrimidine."

由一分子五碳糖(核糖核酸中的核糖、去氧核糖核酸中的去氧核糖)与一含氮的嘌呤或嘧啶相连而成。

Customer-provided data terminal equipment that connects to a communication common carrier' s telecommunication equipment for the purpose of data movement.

用户自备的数据终端设备，它与一个通信公共载波的远程设备相连，以达到传送数据的目的。

Antarctica—Cliffs higher than a hundred feet mark the edge of the Ross Ice Shelf, a glacier-fed slab the size of France connected to the Antarctic coast.

南极洲——高耸至上百英尺的悬崖成为了罗斯冰雪架的标志，它是一个面积几乎与法国一样大的冰川层，与南极洲海岸相连。

Its south borders on the U.S. state of Montana while its north borders on the Northwest Territories.

它的西边是不列颠哥伦比亚省，东部是萨斯喀彻温省，它的南部与美国的蒙大拿州接壤，而北部则与西北地区相连 ssbbww.cOm 。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。