the activity of collecting the numbers of railway engines as a hobby (作为业余爱好)收集机车号码的人 CultureTrainspotting is a hobby in Britain which involves people going to places where trains can be seen, especially railway stations, and collecting the numbers of railway engines they see by writing them down. People sometimes make fun of this hobby and the people who do it because they think it is a boring thing to do. It is now much less popular than it was in the 1950s.- (disapproving)
detailed work that other people think is boring 其他人认为很无聊的详细工作 There’s an element of trainspotting in any specialist field. 任何一个专业领域都有一种猜火车的成分。