1) black speck
黑点，黑斑
2) brown or black spots
棕黑斑点
1.
Causes of brown or black spots in brass barrel plating of small hardware were analyzed and some counter measures were put forward.
分析了小五金产品滚镀黄铜层易产生棕黑斑点的原因,论述了黄铜层出现棕黑斑点是零件基材腐蚀的开始。
3) Gaeana maculata
斑点黑蝉
1.
Primary Investigation Rrport of Gaeana maculata on Acacia mangium Willd;
马占相思斑点黑蝉观察研究初报
6) black spot
黑斑，黑点，盲点，黑点失真
补充资料：黑点
1.黑色小点。 2.比喻过错。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条