to show a strong positive emotion on your face suddenly
突然顔に強いポジティブな感情を示す (totsuzen kao ni tsuyoi pojitibu na kanjō o shimesu)
"Her face lit up with emotion when she saw her mother."
"彼女は母親を見たとき、顔が感情で明るくなった。" (kanojo wa hahaoya o mita toki, kao ga **kanjō de akarukunatta**)
to make someone or something fully informed or updated
to reveal something secret or hidden; to show what you feel
to cause delay or slow down progress
to increase the number of products sold
to be alert and careful about something dangerous
to keep money so you can buy something in the future
