puchi0301のプロフィール

「catch　on」と「catch　on　to」の違いを教えてください。 『理解する』で両方同じように使えるのですか？後者のほうが意味が多いのでしょうか？

The 19th Shumen Regiment, divided in two groups and supported by the 48th Regiment, prepared to descend along a slope directly facing the Romanian fortifications to the bottom of the ravine in front of the Daidur village. As soon as the infantry began advancing it was met with strong rifle and machine gun fire supported by the smaller caliber Romanian turret guns that had survived. Bulgarian field and heavy artillery, still concentrated on Romanian batteries behind the defensive line, provided little direct support.