Keeping away and treating with LSS-Target (the Low altitude, Slow speed Small Target), having become a cosmopolitan difficult problem and studying hotspot.
2
由于电子计算机的存贮量小，运算速度慢，智能化低，特别是制造工艺趋于极限。
Due to small storage capacity, slow operational speed and low intelligentize of electronic computer, Particular, its manufacture technics go to limit.
3
细菌浸矿成本低、环境污染小，但浸出速度慢。
Bacterial leaching has low cost and little environmental pollution, but low leaching velocity.
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