名詞 natural science:

1. the sciences involved in the study of the physical world and its phenomena

1. He devoted the first years of his student lift to mathematics then he studied the natural science; but finally returned to his first love.
   他頭幾年里致力于研究數(shù)學(xué); 后來他又去研究自然科學(xué); 但最后他又回過頭來重操舊業(yè)，研究數(shù)學(xué)。