abruptly - all at once - all of a sudden - bang - bob - bolt - boomtown - break into - burst in - burst into tears - burst open - burst out - burst out laughing - burst through - burst upon - click - cloud over - come to a halt - crash - crop up - cut - cut in - cut up - drop dead - fling - flip-flop - jerk - jump - just like that - leap out - overnight - overnight success - panicky - pop off - pop up - rapid - shoot out - short - shy - skip out on - slam - snatch - spring - spring up - spurt - surging - swerve to the right - take off - twitch - veer

忽而 - 恍 - 猛然 - 突然 - 骤 - 奄 - 猛 - 顿 - 忽然 - 骤然