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From The Times As spring breaks following one of the harshest winters for three decades this incredible image of a pair of mating kingfishers will breathe fresh hope that Britain's most beautiful species of birds can re-establish itself.

汉考克斯现年48岁。他说&我花费了大量时间才拍下这张照片。我躲在河边的一个隐蔽的地点，每天都要静静等候4个小时，有时需要等上一整天，一共花了5个星期的时间。&

Total RNA were extracted from the gonads of two types of Tilapias.The cDNA copies of differential expressed mRNA species were amplified by DD-PCR using an anchored primer 5' dTuN, combined with two of arbitrary' primers and one long primer, respectively.

本文从罗非鱼的性腺提取的总RNA为模板，用5'dT_11N锚定引物和两个随机引物以及一个长引物组合进行DDRT-PCR扩增。

Cygnoides , species which are so different that they are generally ranked in distinct genera, have often bred in this country with either pure parent, and in one single instance they have bred inter se.

是如此不同的种类，以至它们常被归入不同的属，但在英国它们的杂交品种常常与纯父代种之一进行配育，且有一个育出混血后代的例子。

Therefore those who are limited in ascension or choose to limit themselves due to such predispositions are serving one's entire species in doing so.

因此，那些由于这类预设而被限制提升，或选择自己限制提升的人们，正在服务于整个物种。

The results showed that the species richness,the speciesdiversity and its biomass of understorey vegetation decreased with the stand age in-creasing.There was the most significant negative-linear relationship between thiskind of changes and age.It is possible that the certain shading condition may benefit to understorey growing better.The richness,diversity index and biomass of thevegetation in eucalypt plantation decreased with CPR increasing,however,after ro-tating by watermelon one rotation,the richness,the diversity index and biomass ofunderstorey in CP stand increased,this result will provide the possibility of therestoration and reestablishment of vegetation in eucalypt plantations.The nutrientstorage of understorey decreased in accord with the productivity decreased withCPR increasing,this is the result which the stand enviroment became worse and thestand stratum competed with the vegetation for the water and fertility of soil.

结果表明，随着年龄的增长，桉树林下植被物种丰富度降低，多样性减少，生物量下降，这种变化趋势与年龄存在极显著的负线性关系；随着造林密度的增加物种丰富度降低，多样性也下降，但林下植被生物量尚有增加，可能是一定程度的庇荫有利于桉树林下植被的生长；随连栽代次的增加，桉树林下植被丰富度降低，多样性指数下降，生物量减少；但在轮作一茬西瓜后的林地，物种丰富度提高，多样性指数升高，生物量增加，为桉树林下植被的恢复与重建提供了可能性；随连栽代次增加，林下植被养分总量逐代下降，与生产力下降一致，这是林分环境恶化后上层乔木和林下植被对水肥竞争的结果。

One such tropical grassland, the African savanna, is home to some of the world's most recognizable species, including elephants, giraffes, rhinos, zebras, lions, hyenas, and warthogs.

非洲稀树草原，就是这样的热带草原，这里也是世界著名的物种家园，其中有大象、长颈鹿、犀牛、斑马、狮子、鬣狗和疣。

The blue-green algae is one of the main species responsible for blooms and red tide which distribute in freshwater and sea area .

蓝藻在淡水水域和海洋中均有分布，是引起水域发生水华和赤潮的主要种类之一。

Each of the sculptures houses one male siamese fighting fish and exploits their intelligent and territorial behaviour to steer it around the space. These fish have excellent vision both in and out of water and are able to visually locate another of their species over some distance, and males will square up to each other and even fight ferociously to defend a territory.

每一个鱼缸住著一只公斗鱼，各自有自我的智能与地域习惯，这些鱼无论在水里或水外面都有极佳的视觉，能够在一定的距离内锁定另一只公斗鱼，若两只遇上了，它们将会掀起一场大战，捍卫自己的领域。

The common ancestor is, however, too recent for the new species to be a remnant of the first human excursion from Africa, the one that led to Java man and Peking man, now known as Homo erectus.

然而人类共同祖先出现的年代比较接近现代，以致于这新的人种不可能是第一批从非洲出发迁徙人类的残余。这今天被称为直立人的第一批人类，是爪哇人和北京人的祖先。

The common ancestor is, however, too recent for the new species to be a remnant of the first human excursion from Africa, the one that led to Java man and Peking man, now known as Homo erectus.

然而共同的祖先对于新人种又太现代，而不能作为来自非洲的人类首次远足的遗迹，那次远足产生了现在被称为直立人的爪哇猿人和北京猿人的祖先。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。