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Sentence
Span Details
空気力学
aerodynamicsnoun, no-adjective
の
possession, attribution, nominalizer, or nominal linkergrammar
研究
research; study; investigationnoun, suru verb
は
topic markergrammar
航空機
aircraftnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
設計
plan; design; layoutnoun, suru verb
に
direction, time, indirect object, or target markergrammar
欠かせない。
indispensable; essential; vital; crucialexpression, i-adjective