burst out laughing (crying)

突然笑(哭起来)

burn sth off, burn up, burn-up, burner, burning, burnish, burnous, burnt, burnt down, burnt offering, burp, burr, burriedly, burrow, bursar, bursary, burst, burst into, burst into laughter, burst out laughing, burst up, burst upon, burst with, burton, bury, bus, bus lane, bus ride, bus stop, bus-driver, bus-shelter, bus-stop, busboy, busby, bush, bush telegraph, bush-baby, bushed, bushel, bushiness,