AnalyzerSentence analysis4SpansSentence数十年にわたる研究1000 character limitAnalyzeSentence数すう十じゅう年ねんにわたる研けん究きゅうSpan Details数すう十じゅう年ねんseveral decades; many decades; a few decadesnoun, adverbにdirection, time, indirect object, or target markergrammarわたるcross over; go across; extend; span; cover; range-> 渡るgodan verb研けん究きゅうresearch; study; investigationnoun, suru verb
