Another possibility is that the accelerated expansion arises not from a substance but from a modified form of gravity, one that behaves differently on cosmic scales of time and space.

另一种可能性是加速膨胀不是来自物质而是修改的重力形式，其作用在时空的宇宙尺度上是不同的。

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In the island of Trinidad the oil is in the form of asphalt, a substance used for making roads.

在特立尼达岛，石油以沥青—即用作铺路的物质—形式存在。

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However, this is a matter of substance rather than form.

然而，这只是其实质并非表面。

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Last time we reach the third law which is telling us that we can't quite get to zero degrees Kelvin .but that as the temperature approaches zero degrees Kelvin, the absolute entropy of a pure substance in perfect crystalline form is zero.

上次课我们得到了热力学第三定律,这个定律告诉我们我们无法,达到0K的温度,但是在我们接近绝对零度的过程中，以完美晶体形式存在的纯物质的绝对熵,也趋向于零。

麻省理工公开课 - 热力学与动力学课程节选

Lawyers said the ruling upheld a principle that many countries follow but that India didn't that tax authorities should concern themselves only with the corporate structure or "form" of a merger deal, not the substance of what assets are changing hands.

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Cosgrove and his team worked on altering the stickiness of regular gum by changing its water-repellent qualities, encouraging water to form a layer around the substance so that it could be more easily removed from most surfaces.

FORBES: Will Non-Stick Gum Chew Up Wrigley's?

The substance that has such large potential is an isotope called helium-3, a form of helium but with only one neutron instead of two.

CNN: Mining the moon for a nuclear future