国际单位制即将迎来历史性变革
2018年11月16日，世界科技界将齐聚法国凡尔赛，对修订国际单位制（SI）的提案进行表决。如果提案被通过，国际单位制7个基本单位中的4个，即千克、安培、开尔文和摩尔将全部改由自然常数定义。这将是1875年《米制公约》签署以来，国际测量体系面临的最重大变革，对科技创新、产业发展影响深远。以下宣传片由美国国家标准与技术研究院（NIST）出品：
视屏地址：https://v.qq.com/x/page/i0786z2tpgx.html
NIST地址：https://www.nist.gov/si-redefinition/turning-point-humanity-redefining-worlds-measurement-system
附旁白：
Our home.
我们的家园
We’ve come so far…
我们远道而来……
But how did we get here?
可我们是怎么到达这里的呢？
Measurements.
测量
As humans, we learned how to measure
beforewe learned to write.
身为人类的我们
在学会书写之前首先学会了测量
Through measurement we learned to count.
通过测量，我们学会了计数
We used the sun to tell time
我们通过太阳来计时
and based units of length and weight
on other earthly objects.
并用地球上的其他物体建立了
长度和重量的单位
Measurementshelped us to become merchants, builders,
astronomers,navigators, engineers, and scientists.
测量帮助我们成为商人，建筑师，天文学家，航海家，工程师和科学家
The need for better measurements
grew with each invention.
每项新发明都需要更精确的测量
With the adoption of standardized measurements
we created the global economy.
统一的测量体系造就了现在的全球经济
Today, we have reached a pivotal point for humanity.
今天，我们来到了人类文明的一个关键节点
We no longer have to rely on physical objects
for precision measurements.
我们不再需要靠实物进行精准的测量
The rules of nature operate smoothly
From the invisible quantum world
to the far reaches of the universe
无论是隐形的量子世界
还是浩瀚杳渺的宇宙
自然法则放之而皆准
and so should our measurements.
对于测量而言也是如此
For the first time, all of the world’s measurement units
will be accurately defined by nature’s fundamental laws.
第一次，世界上所有的测量单位都将用自然界的基本法则来准确定义
In 2018, the world’s science community will come together
at Versailles to advance measurement science
for generations to come.
2018年，全球科学家将齐聚凡尔赛
为了子孙后代，共同推进测量科学的发展
Anyone anywhere will now be able to precisely measure
mass,temperature, electrical current and amount of substance
just as accurately as we already measure time and distance.
任何人在任何地方
都将能够精确地测量质量、温度、
电流以及物质的量
和我们现在测量时间、距离一样准
We’ve come so far…
我们远道而来……
…and,if history is any indication of the future,
……如果历史可以预示未来，
