Gravity is an attractive force between any two masses.

重力是任何两个物体之间的引力。

And there's attractive forces between the water molecules holding the drop together.

同时还有水分子之间水滴保持在一起的吸引力。

When a voltage is applied across two beamlike electrodes made of aluminium, which are separated by a gap of around 50 nanometres, charge builds up on each, creating an attractive force between them, until a critical point is reached.

两个柱状的铝极间隔约50纳米，当在这两个极之间时，它就会相互通，在二者之间会形成一股引力，直至达到一个临界点。

But as the gases become closer to liquid, as they start to condense, we're going to start to have attractive forces and some of these are going to be dipole-dipole forces.

但是, 随着气体越来越接近液体, 随着它开始凝结, 我开始有吸引力, 其中一些是偶极子-偶极子力。

Remember as a gas gets closer to condensation we're going to have more of these attractive intermolecular forces.

请记住, 当气体接近凝结时, 我拥有更多这些吸引性的分子间力。

In general, we can define gravity as an attractive force that pulls two bodies together.

一般来说，我可以重力定两个物体拉在一起的吸引力。

Motion is the ultimate object of science, and measures of motion are many; but with thought as with matter, the true measure is mass in its astronomic sense — the sum or difference of attractive forces.

运动是科学的最终对象，运动的量度有很多种；但是思想和物质一样，真正的衡量标准是天文学意上的质量——吸引力的总和或差异。

And the decrease in radius from left to right is due to the attractive force between the protons in the nucleus and the electrons in the shells.

从左到右半径的减小是由于原子核中的质子与子层中的子之间的吸引力。

Well, one of the four fundamental forces of physics is the strong nuclear force, an attractive force that acts between protons and neutrons in a nucleus.

好吧，物理学中的四种基本力之一是强力，这是一种作用于原子核内质子和中子之间的吸引力。

Compounding the error, Galileo mocked a proposal made by others, including Kepler, according to which the tides are caused by the attractive force of the moon.

更糟糕的是，伽利略嘲笑了一个由其他人（包括开普勒）提出的观点，该观点认潮汐是由月球的引力吸引力引起的。

For really tiny animals, all they need to do is take advantage of water's strong surface tension, an attractive force between molecules on a liquid.

对于非常小的动物来说， 它所需要做的就是利用水强大的表面张力，即液体分子之间的吸引力。

Now, if you increase the number of carbons, you're going to increase the number of attractive forces that are possible.

现在，如果你增碳原子的数量，你就增了可能存在的吸引力的数量。

So we have an attractive force here between charged balloon and what used to be a neutral wall.

所以这里有一个吸引力，存在于带的气球和原本是中性墙壁之间。

If you have, then you have experienced the effect of surface tension, an attractive force created by chemical bonds between water molecules at a water's surface.

如果有，您就已经体验到了表面张力的作用，表面张力是由水表面的水分子之间的化学键形成的吸引力。

So, it generates a huge attractive force.

所以，它产生了巨大的吸引力。

There will be an attractive force between the two.

两者之间会产生吸引力。

Weaker intermolecular forces, you put more energy in and they're easier to overcome those attractive forces.

较弱的分子间作用力意味着，你只需投入更多能量，就能更容易地克服这些吸引力。

But London dispersion forces are going to be attractive forces.

但伦敦的分散力量成吸引力的力量。

And then you put a little more energy and a little more energy, a little more energy, and ultimately, the intermolecular forces, the attractive forces between two atoms or two molecules, get totally overwhelmed.

然后你再注入一点能量，再一点，再一点，最终，分子间作用力，即两个原子或分子之间的吸引力，会被完全倒。

You can walk on solid ground like dirt, wood, or concrete because the attractive forces between the molecules are strong enough to hold all of them in place.

你可以在泥土、木头或混凝土等坚固的地面上行走， 因分子之间的吸引力足以它固定在适当的位置。