n.保存( conservation的名词复数 )，保护，避免浪费，对自然环境的保护...

conservations的音标：conservations的英式发音音标为：[kɒnsə'veɪʃnz]conservations的美式发音音标为：[kɒnsə'veɪʃnz]...

Thus, the conservations of mass and energy have the ingenerate consistency.因而, 质量守恒和能量守恒具有内在的一致性.Conservations were laid for five.预备了五份饭菜....