单词spim
n.: （互联网）即时通信垃圾广告网络: 垃圾讯息；选择性平面照明显微技术(Selective Plane Illumination Microscopy)；垃圾即时消息
（互联网）即时通信垃圾广告:
advertising sent as messages on the Internet to people who have not asked for it