But you will never breath the natural air, you will never feel unfiltered sun light on your face.

但是您从未将呼吸自然空气，您从未将感觉在您的面孔的未过滤的太阳光。

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Production has just begun at the facility at a former high school field in Shinanomachi and a sweet, sour aroma, similar to that of unfiltered sake, wafts into the air.

在信浓町原先的高中空地上的一座厂房，生产已经开始。一种甜，酸芳香，像是没有过滤的清酒的味道飘荡在空气中。

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Without the droning air-conditioner, the house is oddly peaceable, and the unfiltered clamor seems close enough to touch.

没有了空调机的嗡嗡声，房间飘逸著一种奇异的祥和气氛，还有未经过滤的、亲近的伸手就可触及的夜声。

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After all, the strains on a jumbo jet turbine are far greater: 400 takeoff and landing cycles in a year, massive swings in thrust and temperature, sucking in unfiltered air.

FORBES: Energy