We showthat a mapping froma sequential space is continuous iff it is sequentially continuous,whichi m-proves a result by relaxing first-countability of domains to sequentiality.

• 证明了序列空间上的映射是连续映射当且仅当它是序列连续映射；这一结果减弱了通常要求的定义域空间的第一可数性.