to join an activity or discussion quickly
活動や議論に素早く参加すること (katsudo ya giron ni subayaku sanka suru koto)
"Feel free to jump in on the brainstorming if you have ideas."
"アイデアがあれば、ブレインストーミングに気軽に参加してください。" (aidea ga areba, bureinsutoomingu ni **janpu in on** shite kamaimasen)
feeling sad or depressed
to enroll in or agree to participate in something
to reserve something for a particular purpose
to be responsible for something difficult or unpleasant
very close friends who share everything
to be overlooked or missed in a system or process
