貌似这里往北的地方有个非常机密的项目正在进行。
Apparently there's a very hush-hush project under way up north.
我有紧急和非常机密的商业命题，给你。
I have urgent and very confidential business proposition for you.
J - 20知道最近还是非常机密的，所以没有一个官方名称，在西方防务和情报官员及专家中使用J - XX的说法。
The J-20 was until recently so secret that it did not have an official name and was known as the J-XX among Western defense and intelligence officials and experts.
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