So the US turned the YF-12 into a reconnaissance plane (the amazing SR-71 Blackbird, which remained in service through 1998 and could traverse the US coast to coast in 1 hour).

因此，美国最终把YF - 12改成了侦察机(即令人赞叹的SR - 71黑鸟。它可以在一个小时内横穿美国东西海岸，直到1998年才退役)。

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To study teratogenic effects of YF 1 germicide in mice.

探讨YF 1杀菌剂对小鼠的致畸作用。

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