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1·I have to go after Steve Mercer, she thought for probably the billionth time.

我一定要去找史蒂夫·默瑟，这大概是她第十亿次这样想了。《柯林斯英汉双解大词典》

2·Thus time and time's relativity are measurable by any hourglass, alarm clock, or atomic clock that can measure a billionth of a second.

因此，时间和时间的相对性可以用任何沙漏、闹钟或原子钟来测量，其中原子钟可测量出十亿分之一秒。

3·One NM is one-1 billionth meter.

一纳米是十亿分之一米。

4·A nanometre is a billionth of a metre.

十亿分之一米是一纳米。

5·A nanosecond is one-billionth of a second.

1纳秒为十亿分之一秒。

6·A nucleus is about one billionth the size of an atom.

原子核的体积大约是原子的一万亿分之一。

7·In February 2010, the ten-billionth song was sold on iTunes.

2010年2月，iTunes出售的歌曲已经达到了100亿首。

8·By comparison, Jupiter is one-billionth the brightness of our sun.

作为对比，木星的亮度也只有我们的太阳的十亿分之一。

9·By comparison, Jupiter is one billionth the brightness of our sun.

作为对比，木星的亮度也只有我们的太阳的十亿分之一。

10·Days from now, the human family will welcome its seven billionth member.

再过几天，人类大家庭将迎来第70亿个成员。