adv.显著地；非常地；强烈地
adj.发出啪啦声的；闪光的；急躁的
动词snap的现在分词形式.
She heard a twig snap. 她听到一根细树枝的断裂声。
A sharp, snapping sound, such as the report of a firearm. 爆裂声尖锐的爆裂声(如枪击声)
