And the other optional component here is the introduction.

其他可选组成部分是引子。

Boxing was always an important part of the ancient athletic repertoire.

拳击一直是古代竞技节目十分重要组成部分。

The modern city consists of monstrous edifices and of dark, narrow streets full of petrol fumes and toxic gases, torn by the noise of the taxicabs, lorries and buses, and thronged ceaselessly by great crowds.

大得吓人高楼和阴暗狭窄街道组成了今日现代化城市。街道上充斥汽油味和有毒气体，出租汽车、卡车、公共汽车噪音刺难忍，络绎不绝人群挤来挤去。

Harry noticed the emblem embroidered on their chests: a wand and bone, crossed.

一根魔杖与骨头组成十字。

South Africa has also made its own move to boost trade by becoming the newest member of BRICS, a group of emerging economies comprising Brazil, Russia, India, and China.

南非还通过加入金砖四国组织以此来促进贸易，该组织由巴西、俄罗斯、印度和中国这些新兴经济体组成。

Next came the musicians and a rearguard of capering fakirs, whose cries sometimes drowned the noise of the instruments;these closed the procession.

接是乐队和一支狂热信徒组成大军。他们叫喊声音，有时甚至掩盖了那震乐器声，游行队伍至此才算结束。

Credit cards are an integral part of the U.S. financial system.

信用卡是美国金融体系有机组成部分。

Responsibility, dialogue, action and reporting are the key elements in a virtuous circle through which everyone benefits.

责任、对话、行动和汇报是良性循环中关键组成部分。这个良性循环使大家都受益。

The lemmings leave their nests all together at the same time, forming huge crowds.

旅鼠会在同一时间一起离开它们巢穴，组成巨大迁徙群体。

And, if nanotechnology progresses as expected, as a sort of building block set of about 90 atoms, then you could build anything you wanted from the bottom up.

如果纳米技术能够像预想中那样，以一种90个原子组成构件组合话，我们就可以彻底建造出任何想要东西。

Now, in my mind this ritual has two specific components.

在我看来，这个仪式有两个特定组成部分。

That committee - bipartisan committee - agreed with that assessment, didn't flag any concerns.

这个由两党组成委员会同意这一评估没有指出任何担忧。

Now we are having a network of four hospitals.

现在我们有四个医院组成网络。

Like 2035, Russia aims to build a fleet of 13 heavy-duty icebreakers.

与2035年一样，俄罗斯目标是建造一支由13艘重型破冰船组成舰队。

The sun is covered in a complex network magnetic fields.

太阳复盖由磁场组成复杂网路。

The smugglers are a part of international crime syndicates earning huge sums, notes Di Nicola.

但迪·尼柯拉表示人口走私贩是国际犯罪集团组成部分，而且他们依靠这种行为家。

No one can say that a life with childhood, manhood and old age is not a beautiful arrangement; the day has its morning, noon and sunset, and the year has its seasons, and it is good that it is so.

没有人能够说，由童年、成年和老年组成人生不是一种完美安排;就像一天有早晨、中午和晚上，一年有四季，如此存在就是美好。

I'm a century's old city made up of five boroughs.

我是一个由5个区组成世纪古城。

The bladder is able to expand and contract because it's wrapped in a muscular layer, called the detrusor muscle, and within that, lining the bladder itself is a layer of transitional epithelium containing " umbrella cells" .

膀胱既可以扩张也可以收缩，因为膀胱壁有一层肌肉，叫做逼尿肌，而且膀胱内衬有一层由“伞状细胞”（盖细胞）组成变移上皮。

Now, amazingly, the brain is really good at taking in these signals and extracting patterns and assigning meaning, so that it takes this inner cosmos and puts together a story of this, your subjective world.

不可思议是，大脑很擅长于接受这些信号，提取模式，赋予含义，于是它形成了这种 内部环境来整合信息，并组成了你主观世界。