宇宙膨胀说虽然听似奇特，但它是基本粒子物理学中一些公认的理论在科学上看来可信的推论。
Odd though it sounds, cosmicinflation is a scientifically plausible consequence of some respected ideas in elementary-particle physics.
如果说暗物质真的存在，那将最终导致宇宙膨胀速度的加快。
If dark energy does exist, then it ultimately causes the expansion of the Universe to accelerate.
而这些星系的额外的速度，不是由于宇宙的膨胀，而是由于物质在宇宙中的分布不均匀。具体地说，我们的银河系正被附近的仙女座星系和室女座星系团拉扯着。
And these additional velocities that galaxies have that aren't due to the expansion of the universe are due to the uneven distribution of matter in the universe.
有的说某一天宇宙将会停止膨胀并向其相反的方向运动——逐渐缩小。
Some say it will stop expanding some day and will begin to move in the opposite direction, to grow smaller.
膨胀说告诉我们，早在很久以前，宇宙的体积在不到一秒钟内被一种反引力驱动而发生了无数倍的膨胀。
Inflation says that very early on, the universe expanded in size by more than a trillion trillion trillion trillion fold in much less than a second, propelled by a sort of antigravity.
“一个充满物质的宇宙会收缩至一个小——但有限——的尺寸然后又反弹开，产生我们今天看到的膨胀的宇宙，”他说。
"A universe filled with matter will contract down to a small—but finite—size and then bounce out again, giving us the expanding cosmos we see today, " he says.
当你说我们住在一个不断变化、膨胀的宇宙中时，有些明显的事情你会想知道。
These are the obvious things you want to know when you say we live in a changing, expanding universe.
它的定义是说宇宙是由一个超新星爆炸后不断膨胀形成的。
It is defined as the universe is said by a supernova explosion to form the ever-expanding.
虽说今天的宇宙还在膨胀，但霍金教授说：“正的物质能量刚好和负的引力能量相互平衡，这样就使得总能量为零。”
Although today's universe is still expanding, Professor Hawking holds that the plus matter energy balances the minus gravitation energy, thus the total energy is zero.
新可能，比如说，在大霹雳之前五秒的宇宙，和大霹雳之后五秒的宇宙，以同样的速度膨胀。
The combination gives rise to new possible cosmologies in which the universe, say, five seconds before the big bang expanded at the same pace as it did five seconds after the bang.
新可能，比如说，在大霹雳之前五秒的宇宙，和大霹雳之后五秒的宇宙，以同样的速度膨胀。
The combination gives rise to new possible cosmologies in which the universe, say, five seconds before the big bang expanded at the same pace as it did five seconds after the bang.
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