to do something that is considered unacceptable
受け入れられないと考えられることをする (ukeirarenai to kangaeraru koto o suru)
"He crossed the line when he insulted her in front of everyone."
"彼は皆の前で彼女を侮辱した時、一線を越えた。" (kare wa mina no mae de kanojo o bujoku shita toki, issen o koeta)
to replace old things or ideas with new ones
to finish something before the deadline
to find the real cause of a problem
it's not difficult to understand
A situation or person that could become dangerous at any mom...
to make an effort to improve your performance
