Usages of sinkokuna
規則 を 守らない と 深刻な 問題 が 起こる かも しれません。kisoku wo mamoranai to sinkokuna mondai ga okoru kamo siremasen.
If the rules are not followed, serious problems may occur.
深刻な 問題 が あります。sinkokuna mondai ga arimasu.
There is a serious problem.
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