burst into laughter

突然笑起来

burn oneself out, burn out, 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 out laughing, burst out laughing (crying), 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,