a product or service that consistently generates a lot of money
常に多くのお金を生み出す製品やサービス (tsune ni ooku no okane o umidasu seihin ya saabisu)
"Their mobile app has become a cash cow for the company."
"彼らのモバイルアプリは会社にとっての稼ぎ頭になった。" (karera no mobairu apuri wa kaisha ni totte no kasegi gashira ni natta)
to act in a way that helps other people
someone who is very similar to their parent
very tough and determined
until the very last moment; close to the deadline
to look very happy and cheerful
to understand both perspectives in an argument
