十亿分之一

Because Betelgeuse is expanding in size while losing mass, its density has become very low: the star is now about a billion times less dense than the air on Earth.

由于参宿四的体积在不断扩大，质量却在不断减少，其密度最后变得非常小：目前的密度是地球上空气的十亿分之一。

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

原子核的大小约为原子的十亿分之一。

DNA computer, the energy consumption is very small, only the one billionth computer.

DNA计算机，能源消耗非常小，只有电脑的十亿分之一。

In the nanoworld,objects are measured in nanometers --1 billionth of a meter.

在纳米世界里，物体的度量衡为纳米——十亿分之一米。

In the nanoworld, objects are measured in nano meter s --1 billionth of a meter

在纳米世界里，物体的度量衡为纳米——十亿分之一米。

The visible region extends from about 390 to 780 nanometers (a nanometer is one billionth of one meter).

可见区域延伸至约390至780纳米（ 1纳米等于十亿分之一1米）。

A nanometer is a measure of length equal to one billionth of a meter.

纳米是一个长度测量单位，相当于十亿分之一米。

Another unit sometimes used to measure wavelength of light waves is nanometers which are equal to 1 billionth of a meter.

有时用来测量光波波长的另一个单位是纳米是等于1十亿分之一米。

A nanometer is equal to about one billionth of a meter.

1纳米，约等于十亿分之一米。

By using the glass beads, they were able to get separations as small as 10 nanometers (10 billionths of a meter, or one-hundredth the distance achieved before), and are now working on getting even closer spacings.

通过使用玻璃珠，他们能够获得离职小10纳米（ 10十亿分之一米，或百分之一的距离以前实现），以及现正得到更紧密的间距。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。