to handle or change something carelessly and cause problems
随便处理或更改某事，导致问题 (suíbiàn chǔlǐ huò gēnggǎi mǒushì, dǎozhì wèntí)
"Don't mess around with the settings or you might break it."
"不要随便更改设置，否则可能会坏掉。" (bùyào suíbiàn gēnggǎi shèzhì, fǒuzé kěnéng huì huài diào)
to slowly exhale to release tension
to choose something after thinking carefully
to volunteer or take initiative for something
to stay focused on the main topic during a discussion
to invest time or money into something
to record the time when you start work
