クレーンを操縦するのには、勿論、免許が必要です。

Of course, a license is needed to operate a crane.

「私も頂いていいですか」「ああ、勿論構わないよ、今日は会社持ちだからね」

"May I have one as well?" "Yes, certainly. Today's on the company after all."

勿体振るのはやめてくれ。

Don't give yourself airs.

己の欲せざる所は人に施す勿れ。

Do to others as you would have others do to you.