If the eyes perform as they must, you perceive colour. But In the event your cones Will not get the job done effectively, you'll be unable to tell apart the colours red, green or blue.上り勾配; グレードアップ; 上り坂; 規模拡大; 上質; アップグレイド; 容量増加(pp. 215–6) From your early times of The usa, whiteness wa