at a time

• You can copy only one connection manager at a time
  每次只能复制一个连接管理器。
• 2 one at a time by one woman began in 1958
  第二的答案是由一个女人一次过种的。
• He tossed the peanuts into his mouth one at a time
  他每次将一粒花生扔进嘴里。
• An item can only be in one group at a time
  在同一时间，一个项只能属于一个组。
• Control , only one item can be selected at a time
  控件中，一次只能选择一个项。
• Carry out your installation one node at a time
  一次只能在一个节点上进行安装。
• You can only modify one role assignment at a time
  一次只能修改一个角色分配。
• I ' ll work with you one at a time and you can be first
  我逐一带你们跳，你先来