at a time

• These electrons will arrive at a time later at the collector .
  这些电子经过一段时间以后到达收集器。
• Do not try to do everything at once ; take it a bit at a time .
  不要什么事情都一块儿干，要一次做一点儿。
• It would be insupportable if these were to be examined one at a time .
  如果一次只查看一个形象，那就难以忍受了。
• Thither we used to repair there for hours at a time .
  当时，我们常常成群结队地去那儿，而且每次一玩就是几个小时。
• It was a very interesting episode at a time when we were dying .
  这是正当我们快要倒闭的时候出现的一段很有意思的插曲。
• She brought her children into the world at a time when obstetrics was a primitive art .
  她生孩子的时候，产科学还是一门原始医术。
• I'm awfully sorry, but i can never be polite to more than one person at a time .
  很对不起，可是我在同一时间里只能对一个人献殷勤。
• At a time like this, scorching iron, not convincing argument, is needed .
  现在这种时候，需要的不是有说服力的论理，而是炽热的烙铁。
• Besides these eight lines, the processor must be able to select one device at a time .
  在这8条线之外，处理器还必须做到一次只选择一个器件。
• I'll slice off his limbs one at a time and he won't even know where they're gone .
  把他的四肢一次切掉一段，他甚至会搞不清他的肢体到哪里去了。