Heisenberg had not proceeded very far with this idea before he noticed that it would lead to his physical quantities not satisfying the commutative law of multiplication.

在意识到矩阵表示将导致物理量不满足乘法交换律之前，海森堡并没有前进太远。

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Relations between physical quantities are usually given in the form of equations.

物理量之间的关系通常用公式表示。

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Physics after Newton has always been trying to construct a real picture of nature, which has been conducted by seeking for the connection between space, time and other physical quantities.

牛顿之后的物理学试图构建关于自然界的实在图景，这一图景通过建立关于空间、时间与其他物理量之间的联络关系来实现。

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So now we have this derivative, in terms of physical quantities, things that we can measure.

现在我们得到了这个导数,它可以用实验可测的与。

麻省理工公开课 - 热力学与动力学课程节选

So if someone calls you up and suggests that you might like to invest a bit in physical quantities of rare earth metals.

FORBES: Investing in Rare Earth Metals: Don't Do It!

Whether the presence of acid conditions or surface active digestive substances in the guts of such marine organisms can desorb and release contaminants in significant quantities to cause such effects, or whether such a response is to their physical presence, remains to be answered.

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