轰20研制成功了吗?性能超美军B2 关键参数首曝,轰20性能超越美军B2,首曝关键参数,研制成功之谜揭晓
Has the H-20 been successfully developed? The key parameters of the H-20, which surpasses the performance of the US military B2, are revealed for the first time. The mystery of its successful development is revealed
以上为机器翻译结果，长、整句建议使用 人工翻译 。