公敌第一：许多人不喜欢或不赞成的人或事物。
the first element in a countable series
同义词： first / number one
The album went straight into the charts at number 1.
这张专辑一进入每周流行唱片排行榜便占首位。
Obviously, number 1 is Fluency.
显而易见，关键是要流畅表达。
He was seeded number 1.
他被定为一号种子选手。
The number of cancer cases and deaths from cancer are expected to increase 1% each year.
VOA : special.2009.01.13
That means that p1 and -- where I am, the point number 1 and point number 2 were completely arbitrary.
因为1和，两个点是2,陆军上面。
热力学与动力学课程节选 : 麻省理工公开课
In a moment I'm going to ask you to humor us and stand up but not just yet; and then you're going to each take on the number 1-- think to yourself I am number 1.
待会儿我让大家站起来,一起娱乐一下,不过不是现在,一会儿你们每人都代表一个数字1，心里默想，“我是1号“
计算机科学课程节选 : 哈佛公开课
And he said the number of facilities supplying anti-retroviral drugs used to combat AIDS would be doubled from 500 to 1,000.
VOA : standard.2010.04.26
Under the plan, the government would also triple the number of condoms distributed each year to 1.5 billion.
VOA : standard.2010.04.26
Stone circles number 1, 000 across the country, while there are around 120 henges known.
There are clearly many other benefits, but it seems to me this is benefit number 1.
The former mayor autographed the lid, which is number 1, 000, and has visited the museum twice.