by hand

• A lot of the garbage he sorts by hand .
  大量垃圾都是经过他的手清理的。
• Before that date, books were copied by hand .
  在那个时期以前，书籍是手抄的。
• I am told that the carpets in your factory are made by hand .
  我听说，我们厂的地毯是手工制造的。
• Solving a 100th-degree equation by hand is out of the question .
  靠手算来解100次方程式是不可能的。
• Producing hybrid corn is a lengthy process which must be done by hand .
  生产杂交玉米是一个漫长的过程，要靠手工劳作。
• The procedure above can easily be performed by hand for a small project .
  上述方法对于小型工程任务用手工处理也很方便。
• Glass is separated by hand at the dump and ferrous metal removed by magnet .
  玻璃在堆放场用手拣出，黑色金属用磁铁分出。
• She had been attracted only by hands that were fine and suave, like those of her father .
  只有象她父亲那么纤细文雅的手，对她才有吸引力。
• Operators working in the exchange made all the connections between callers by hand .
  互通电话人之间的接线工作全部由电话局里的话务员操作。
• These diagrams are especially helpful when we have a concrete problem to be solved by hand .
  当我们要用于解答一个具体问题时，这些图解是特别有用的。