[] (usually used with an adverb or a preposition 通常与副词或介词连用) to act or happen very quickly and in an impressive way 快速行动；很快发生◆Share prices have come roaring back (= they have increased a lot very quickly). 股价快速回升。◆Sales roared ahead in the second half of the year. 今年下半年销售量高速增长。