Upperwing has pale greyish-white primary bases and often pale rufous or yellowish-brown forewing, paler than dark grey flight-feathers. 翼上初级飞羽呈现灰白色,翼前缘经常为淡棕色或黄棕色,比飞羽的深灰色要浅。
The wood is light in colour ranging from a nearly white to greyish-white. 木材颜色浅,由近乎白色到灰白色不等。
So, greyish-white, uniform, porous and smooth film could be obtained on the surface of magnesium alloy. 采用此工艺能在镁合金表面上形成灰白色、均匀、多孔的光滑氧化膜。