And even if these problems are overcome, using existing satellite technology it may not be possible to place enough of these devices in space to achieve full coverage because of the billions of dollars it takes to build and launch them.
英
美
- 即使這些問(wèn)題得到解決，現有的衛星技術(shù)也可能無(wú)法在太空安置足夠多的裝置以實(shí)現全球覆蓋，因為制造和發(fā)射這些設備需要數十億美元。
