to remain calm and not get too emotional
冷静を保ち、感情的になりすぎない (reisei wo tamochi, kanjouteki ni narisuginai)
"In a crisis, it's important to keep a cool head."
"危機の時には、冷静でいることが重要です。" (Kiki no toki ni wa, reisei de iru koto ga juuyou desu.)
to encourage someone to continue or try harder
to queue in anticipation of something
to become friends again after a disagreement
to finish preparations or close something securely
to make someone very annoyed or angry
to explain something in simple, non-technical language