They're also pharmacists and clerical workers.

他们也是药剂师和文职人员。

It’s not easy to switch clerical workers around.

【switch】想调换办公室工作人员并不容易。

For example, production workers rated advancement very highly, whereas clerical workers rated advancement in the lower third of their list.

比如，生产工人认为晋升相当重要，可办公室工作人员则将它排在倒数第三位。

For years almost all that was known about them was thanks to the work of a devoted amateur, a London clerical worker named David Bryce who studied them in his spare time.

在过去几年里，几乎所有的已知种类都归功于一位热心的业余人员的努力。他是伦敦的一位办事员，名叫戴维·布赖斯，在业余时间研究吸螨。