Traffic open up — 교통정체가 풀리다→ Traffic finally opened up after the tunnel.open up — 마음을 열다(경계를 풀다)→ He really opened up once the topic changed.(view) open up — (시야가) 열리다→ The view opened up as we reached the top.(something) open up — (무언가가) 열리다→ The café opens up at 9.open up (something) — (무언가를) 열다→ China began to open up its economy to the world.open up (chance) — (기회를) 열다(가져다주다)→ This job could..