n. a person with special knowledge or ability who performs skillfully
n. 专家, 行家
a. 老练的, 内行的, 专门的
[计] 高级
1. The expert gave a great presentation on climate change.
这位专家就气候变化进行了精彩的演讲。
2. She is an expert in computer programming.
她是一位计算机编程方面的专家。
3. You should ask an expert for advice before making a decision.
在做决定之前,你应该咨询专家的意见。