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Sentence analysis
6Spans
Sentence
Span Details
原子炉
nuclear reactor; atomic reactornoun
が
subject markergrammar
臨界
boundary; threshold; criticality; nuclear criticality; critical; at the critical pointnoun, noun-modifying
に
direction, time, indirect object, or target markergrammar
達し
reach; arrive at; attain-> 達するsuru verb
た。
past tense or completed actiongrammar