Omar Shehata 6acd9d0d05 Clarify why quaternions are used 6 年之前
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en 6acd9d0d05 Clarify why quaternions are used 6 年之前
zh 6acd9d0d05 Clarify why quaternions are used 6 年之前
CONTRIBUTING.md c2d5c00ae2 Fix typo 10 年之前