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Sentence
Span Details
上位互換性
downward compatibility; backward compatibility; upward compatibility; forward compatibilitynoun
が
subject markergrammar
ある
be; exist; have; possess; there is available; be located; be situated; be equipped with; have as a facility or feature; happen; take place; come about; be in a completed state; be left as done-> 有るgodan verb, auxiliary