quiet or calm people often have deep thoughts or emotions
las personas tranquilas o calladas suelen tener pensamientos o emociones profundas (las personas tranquilas o kayadas swelen tener pensamientosh o emosiones profundas)
"He may seem quiet, but remember, still waters run deep."
"Puede parecer callado, pero recuerda, las aguas tranquilas son profundas." (pwede pareser kayado pero rekwerda las aguas tranquilas son profundas)
a short and catchy quote used in media coverage
being in a leading or important position in a field
to deal with a difficult technological challenge
to delay making a final decision so you have choices
to try very hard to help or please someone
to cause a significant change in a situation or trend