Unverified50% confidenceFactExact time
The Boeing 747 is not a simple scaled-up Boeing 707; each successive generation of larger aircraft must adopt entirely new structural design concepts.
1
Sources
50%
Confidence
Long-term
Relevance
8/17/2026
First Seen
Sources
伽利略平方立方定律：为什么巨人在物理上不可能存在
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