hot spot
noun
1- a small area or region with a relatively hot temperature in comparison to its surroundings热岛（温度比周围地方高的小块区域或地区）。
1.1
- Geology an area of volcanic activity, especially where this is isolated【地质】火山活动区（尤指隔离之地）。
1.2
- figurative a place of significant activity or danger〈喻〉有重要活动的地方; 非常危险的地方。
1.3
- Computing an area on the screen which can be clicked on to start an operation such as loading a file【计算机】（屏幕上的）热点。