Fourno富尔诺fournum.四four-span continuous beams四跨连续Four Seasons Resort at Sayan山妍四季酒店four - dimension extension四维拓展four hundred and ninety nine(=499) 四百九十九four-step design technique4步骤设计法Fourier analysis-synthesis傅里叶分析合成four hundred and thirty four(=434) 四百三十四four letter extended acrontm四字母组合词four thousand and forty four(=4044) 四千零四十四four - state superposition四态叠加,多模叠加态光场