Satellite surveys and large arrays of iceberg-mounted probes are a useful addition, but much is still done by hardy individuals camped out in the cold.
卫星测量和登上冰山的大量调查也是有益的补充，但是大部分还得靠在严寒中宿营的意志坚强的个人来完成。
2
US satellite images claim there is a base south of Shanghai with nearly 10 vehicle-mounted launchers and 96l6e long-range surveillance radar.