The youngest operator is 27 years old, the oldest has been working here from 1974. The work is said to be hard, particularly the psychological aspect.

最年前的接线员只有27岁，最老的从1974年开始工作至今，据说工作很艰难，尤其是心理方面。

youdao

It's hard to do this well if you've never been an operator.

这很难做到，如果你曾经没有运作过公司。

youdao

The traditional methods, such as optical reference method, enclosed ruler method, are hard and dangerous to operator, and their measuring efficiency is low.

通常采用的传统测量方法，如光学参比法和围尺法，其操作者的劳动强度大，操作危险，测量效率低。

youdao

But Transneft, the pipeline operator, is proving a hard bargainer.

ECONOMIST: Chechnya

The authority recently took back the lido from a commercial operator but has said so much work is needed it is hard to predict when the pool might reopen.

BBC: Brighton council plans urgent Saltdean Lido repairs