Who knows the secret of the black box?
黑匣子之秘密，谁人知晓？
He used a black hat to pass secret messages.
他用一顶黑帽子来传递隐秘的信息。
Meanwhile, another " black" (secret) project, the B-2 bomber, was also built using stealth technology.
与此同时，另一项采用隐形技术制造B?2轰炸机的“黑色”（秘密）计划也已开始。
The existence of black and white contract is an open secret in the construction market, and is also a tough problem in the contract management.
黑白合同的存在是建设工程市场公开的秘密，也是合同管理中一个棘手的问题。
Secret Garden is a collection of black-and-white drawings you can fill with color.
《秘密花园》是一本黑白画集，读者可为其上色。
Secret Garden is a collection of black-and-white drawings you can fill with color.
《秘密花园》是一本黑白画集，读者可为其上色。
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