English translation of '时而'

副

1. sometimes
   ⇒ 电脑时而出故障。 (Diànnǎo shí'ér chū gùzhàng.) The computer sometimes plays up.
   ⇒ 他精神失常了,时而大哭,时而大笑。 (Tā jīngshén shīcháng le, shí'ér dà kū, shí'ér dà xiào.) He's psychologically unbalanced — one moment he's in floods of tears, the next he'slaughing uncontrollably.