n. blacking
vt. blackwash
misc. foundry blacking
水线带是许多军舰水线使用的黑色涂料。
Boot Topping is the black paint used at the waterline of many warships.
所以，不要浪费银子去买黑色涂料的伞啦，银色涂料同样是不错的。
So, don't throw more money at buying umbrellas with black coatings, as silver is just as good.
“许多材料能够很好地吸收阳光，但是无法转化成电能，比如黑色涂料，”他解释说。
"Many materials can absorb light quite well but not generate electricity-like, for instance, black paint," he explains.
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