The fine structure constant, and other fundamental constants, are absolutely central to our current theory of physics.
微细构造常数和其他基本常数都无疑是我们现在研究的核心。
For functions and constants, if the current namespace does not contain that function or constant, PHP's fallback mechanism will fall back to the standard PHP function.
对于函数和常量,如果当前的名称空间不包含这个函数或常量,PHP的后退机制会后退到标准的php函数。
The current at the channel base is specified, and use two time constants can get the much better shapes than single time constant.
模型对于特定的雷电通道底部电流,采用了汉时间常数,取得了比单时间常数更好的拟合效果。
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