Some workers, like Jane Matheson, are retrained to handle the new equipment, but often a whole new set of skills is required and that means a new, and invariably smaller set of workers.

有些工人，比如JaneMatheson，会重新接受培训来使用新设备，但通常需要一整套新的技能，这意味着需要一批新的、规模更小的工人。