Low levels of straying are crucial, since the process provides a source of novel genes and a mechanism by which a location can be repopulated should the fish there disappear.
低水平的游离是至关重要的，因为这个过程提供了一种新基因的来源和一种机制，通过这种机制，如果该地鱼群消失，可以重新繁殖该种群。
There are a number of distinguishing characteristics by which you can identify a Hollywood epic.
通过其诸多与众不同的特点,你可以识别出好莱坞的史诗影片。
There are a number of ways by which temperature influences economic activities.
温度影响经济活动的方式有很多。
A symbol by which the relief workers could be recognized was devised.
一个可以用来识别救援人员的标志被设计了出来。
Milton is narrating or representing the process by which they are silenced.
弥尔顿在叙述或描绘这个他们缄默的过程。
Milton is narrating or representing the process by which they are silenced.
弥尔顿在叙述或描绘这个他们缄默的过程。
At least until spring arrived, by which time they were dealing with damaging floods.
至少在春天到来之前，他们一直在处理洪灾。
The MSC has established a set of criteria by which commercial fisheries can be judged.
MSC已经建立了一套可以用来衡量商业渔业的标准。
It's defined by which horizontal or vertical slice of the world you connect yourself with.
它是由你所连接的世界的水平或垂直部分来定义的。
The complications will greatly increase the risk of diabetes, by which about 75% of the deaths are caused.
这些并发症将大大增加患糖尿病的风险，约75%的死亡是由糖尿病引起的。
The study suggests that the cultures we grow up in influence the basic processes by which we see world around us.
研究表明，我们在成长中所受到的文化熏陶影响着我们看待周围世界的基本过程。
The neocortex is also responsible for the process by which we decide on and commit to particular courses of action.
新大脑皮层也负责我们决定和采取特定行动的过程。
To create a factory-built skyscraper, Broad had to abandon the principles by which skyscrapers are typically designed.
为了在工厂之上建造摩天大楼，远大集团不得不放弃摩天大楼通常的设计原则。
Last time we talked about photosynthesis, the process by which plants use light to convert carbon dioxide and water into food.
上次我们讨论了光合作用，即植物利用光将二氧化碳和水转化为食物的过程。
The third and final stage was to lift the entire structure into the air, by which time the hull was also supported from below.
第三个阶段，也是最后一个阶段，是把整个建筑升到空中，这时船体也在下面起支撑作用。
The blind fury here is the mythological figure Atropos; this is the Fate that cuts the slender thread by which our lives dangle.
这里的盲目暴怒是指神话人物阿特洛波斯；这是命运剪断了生命悬线的细线。
According to Valerie Gauthier, associate dean at HEC Paris, the key lies in the process by which MBA programmes recruit their students.
巴黎高等商学院的副院长ValerieGauthier 表示，MBA课程招生的过程是关键。
In short, the mechanisms by which our brains learn language, math, physics, and every other subject don't differ between boys and girls.
简而言之，男孩和女孩的大脑学习语言、数学、物理和其他学科的机制并没有什么不同。
If I were not good, by which she meant if I did not behave with a single eye to her personal convenience, the cock would come down the chimney.
如果我不听话，也就是如果我做什么事情，只要稍微没考虑到她个人方便与否的话，那只公鸡就会从烟囱上下来。
Great Britain had large amounts of coal; however, there were not yet efficient means by which to produce mechanical energy or to power machinery.
英国有大量的煤；然而，当时还没有有效的方法来产生机械能或为机器提供动力。
When one considers the many ways by which organisms are completely destroyed after death, it is remarkable that fossils are as common as they are.
当我们考虑到生物在死亡后被完全摧毁的许多方式时，化石能够和生物本身一样常见这一事实是很令人惊讶的。
There's a video-sharing ability, by which you can watch videos with other people, though your interactions are limited to a chatroom besides the video.
通过一个视频分享的功能，你可以同其它人一起观看视频，不过你们的互动仅限于视频以外的聊天室。
The first wrongly assumes that the pterosaurs' hind feet resembled a bat's and could serve as hooks by which the animal could hang in preparation for flight.
第一个（假设）错误地认为翼龙的后脚类似于蝙蝠的后脚，可以作为钩子，用来挂起来准备飞行。
One way the study of epigenetics is revolutionizing our understanding of biology is by revealing a mechanism by which the environment directly impacts on genes.
研究表观遗传学的一个方法是通过揭示环境直接影响基因的机制来彻底改变我们对生物学的理解。
Conflict and competition are both categories of opposition, which has been defined as a process by which social entities function in the disservice of one another.
冲突和竞争都是对立的两类，对立被定义为社会实体相互损害的过程。
As a result of these diverse methods by which plants supply resources, unique soil communities form under different plant species and under plant communities that differ in composition.
由于植物提供资源的方法不同，在不同的植物种类和组成不同的植物群落下形成了独特的土壤群落。
Chinese polite and self-depreciatory expressions includes words and phrases by which the speaker can achieve a better result in communication.
汉语的礼貌用语和自我贬低用语包括说话人在交际中可以取得较好效果的词语和短语。
Define the means by which to test the document.
定义测试文档的方法。
To a large degree it's the name by which we know it.
在很大程度上，我们所知道的就是它的名字。
You have seen the steps by which APF authenticates a user.
您已经了解了APF对用户进行身份验证的步骤。
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