to visit someone casually and without an appointment
誰かをカジュアルに、予約なしで訪問する (dareka o kajuaru ni, yoyaku nashi de hōmon suru)
"We decided to drop in on our cousins while passing through their town."
"私たちは彼らの町を通り過ぎる時、ドロップ イン オン 私たちのいとこに決めました。" (watashitachi wa karera no machi o tōrisugiru toki, **drop in on** watashitachi no itoko ni kimemashita)
to incorporate comments into the next version
to confirm information with at least two independent sources
to have no more of something to sell
to make people notice or focus on important problems
to aim for something ambitious or challenging
to continue advancing toward a goal despite difficulties