“D’Alembertian”的概念、定义、翻译、参考文献-科学参考

单词	D’Alembertian
释义	D’Alembertian Physics Symbol □ (sometimes printed □²). An operator that is the analogue of the Laplace operator in four-dimensional Minkowski space–time, i.e. $□ = \partial^{2} / \partial x^{2} + \partial^{2} / \partial y^{2} + \partial^{2} / \partial z^{2} - (1 / c^{2}) \partial^{2} / \partial t^{2},$ where c is the speed of light. The D’Alembertian is very useful in the special theory of relativity.
随便看	urban design urban diseconomies urban dome urban ecology urban economics urban geography urban governance urban heat island urban hydrology Urban II urbanism urbanization urbanization curve urbanization economies urban morphology urban planning urban political ecology urban regeneration urban social geography urban sprawl urban system urban theory Urban VIII (1568–1644) urban village Urca process

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