The major component of concentration is the ability to focus ones attention on the task at hand and thereby not to be disturbed or affected by irrelevant external and internal stimulus.
专注主要是指把注意力集中于即将到来的任务，而不受不相关的内部或外部刺激所干扰和影响。
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Every principle component is the linear combination of the original variables and is irrelevant to each other. The spectra data can be stored and dealt with computer by reducing…