它很大，通常是黑色。
Mold is usually green, white, black or gray.
霉菌通常为绿色、白色、黑色或灰色。
Two wires are attached to the magnet, usually red and black.
磁铁上连接着两根电线，通常分别为红色和黑色。
It usually has a negative connotation (blacklist, black humor, 'black death').
它通常具有否定含义(黑名单、黑色幽默、“黑死病”)。
Meat, produce, cooking oil and basic medicines are usually available only on the black market.
肉，产品，食用油，基本的药品只能在黑市才买得到。
As opposed to black, white usually has a positive connotation.
与黑色不同，白色常有肯定的含义。
People usually dress in black when they go to a funeral.
人们出席丧礼时通常会穿黑色衣服。
Wear shoes that match the color of your outfit. Black is usually the best.
鞋子的颜色和衣服要相称，一般而言黑色最适当。
Wear shoes that match the color of your outfit. Black is usually the best.
鞋子的颜色和衣服要相称，一般而言黑色最适当。
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