twice

adv

• ① 两次,两回
  • He knocked on the door twice.他敲门两次。
  • She has twice visited Paris.她曾访问巴黎两次。
  • once or twice一两次
  • twice or thrice两三回

• ② 二倍地,倍增地
  • twice as big as ...有…的二倍大
  • twice as many二倍(的数)
  • twice as much二倍(的量)
  • Twice four is [are] eight.二乘四是八。
  • She's twice my age.=She's twice as old as I am.她的年龄大我两倍。