单词billionth
adj.: 第十亿(个)的；第一万亿(个)的
num.: 十亿分之一；第一万亿
网络: 第十亿的；奈
第一万亿(个)的〔英、德用法〕
第十亿(个)的〔美、法用法〕
第一万亿,万亿分之一
第十亿,十亿分之一
n.morselparticlemodicumtouchportion
At a distance of about 300 nanometres (a nanometre is a billionth of a metre), the seesaw began to tilt towards the ball.
其间距离大约为300纳米时（1纳米是十亿分之一米），秋千开始移向小球。
Yet as we get ready to welcome the birth of the seven billionth person later this year, the mood should be celebratory, not dour.
然而当我们准备欢迎的诞生，今年晚些时候的一百人七，心情应该庆祝，而不是严苛。
The child is one of several in countries around the world being declared a symbolic seven billionth human.
这个婴儿是世界上几个被预言会出生的象征第70亿人口的婴儿之一。
A broken networked intelligence may be able to calculate pi to the billionth digit but not forward e-mail to a new address.
一个有损伤的网络智能也许能计算出圆周率的第十亿个数位，却不能向新地址转发邮件；
Dr Raskar and his students are working with one that fires its pulse in a thousand billionth of a second.
Raskar博士和他的学生正在研制一个在一万亿分之一秒内发射脉冲的激光。
The water droplets themselves can be as small as a nanometre (a billionth of a metre) across.
水滴的直径可微小至一纳米（一米的十亿分之一）。
Visible light makes up less than one ten-billionth of the electromagnetic spectrum, which stretches from radio waves to gamma rays.
在覆盖了从无线电波到伽马射线的电磁光谱中，可见光只占不到百亿分之一的比例。
The microblogging site only reached its one billionth Tweet last November, and was only up to 1. 6 billion in April.
微博网站Twitter的信息贴去年11月才达到10亿。
He says the seven billionth person was likely to be a girl born in rural Uttar Pradesh.
他表示，第70亿人可能是出生于印度北方邦农村的一名女孩。
That energy level corresponds to energies present when the universe was only one ten-billionth of a second old.
这个能级只是相当于宇宙产生一秒钟后能量的一亿分之一。