Analyzer
Sentence analysis
5Spans
Sentence
Span Details
捜査
criminal investigation; inquiry; searchnoun, suru verb, no-adjective
は
topic markergrammar
難航
difficult voyage; stormy passage; hard flight; rough going; running into trouble; proceeding with difficultynoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
ている。
ongoing or resultant stategrammar