a synoptic map的用法和样例：
- There are many vortex patterns on synoptic maps.
- Data are collected on a weather map, which map, which help the exports to get a synoptic view of world weather.
- Firstly, a synoptic concept model about its happening was developed.
- As a weather observer, his job was to plot synoptic maps and launch wind balloons into the deep blue North African sky.