Number of different species: 50, 000 in the lightzone of the ocean alone.
不同种类数量：仅在海洋光区就有50 000。
2
The early warning signal system of unemployment is based on the level of unemployment cordon, in different "lightzone" has the appropriate contingency plans for the unemployed;
失业预警信号灯系统是根据失业警戒线的层次划分建立起来的，在不同的“灯区”有相应的失业应急预案；
3
According to the demands of crop and livestock for sunlight illumination condition, 4 zones, namely, dark lightzone, weak lightzone, moderate lightzone and strong lightzone were divided.