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Span Details
特殊相対性理論
special theory of relativitynoun
では、
contrastive で + は; then; well thengrammar
四元速度
four-velocitynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
大きさ
size; dimensions; volumenoun
は
topic markergrammar
常に
always; constantly; at all timesadverb
光速
speed of lightnoun
に
direction, time, indirect object, or target markergrammar
等しい。
equal; identical; the same; no different (from); just like; equivalenti-adjective