The correct use of reduction in appropriate reduced English would make you sound very American.
如果你能在合适的时候正确地使用弱音，听起来你就很像地道的美国人了。
Building outer wall high temperature fire protection, sound-insulated noise reduction.
建筑物外墙高温防火、隔音降噪。
Building outer wall high temperature fire protection, sound-insulated noise reduction.
建筑物外墙高温防火、隔音降噪。
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