an expert job meaning in English

需有专门知识的工作

There is always a steep learning curve when it comes to responding to calamities of this kind , and mother nature does an expert job of keeping us on our toes
这总是有一个陡峭的学习曲线当他用来响应这类灾难，大自然母亲作了专家工作从而使我们保持警觉。
It was the first time for some of our volunteers to participate in such an event , but they did an expert job in introducing master s teachings , and answered numerous questions about meditation on the inner light and sound
有些同修是第一次参加这种活动，但他们都能侃侃自如地向观众介绍师父教理，回答关于观内在光和音的问题。