intelligence or brainpower
智慧或大脑能力 (zhìhuì huò dànǎo nénglì)
"It takes a lot of gray matter to solve such a complex problem."
"解决这样复杂的问题需要很多智慧。" (Jiějué zhèyàng fùzá de wèntí xūyào hěn duō huīsè wùzhì.)
a young or innocent kind of love
to join someone’s online activity or conversation uninvited
Things are more fun or effective with more people involved.
to tell someone angrily what you think
to accept and confront a difficult situation
protected or isolated from external threats