The most radical strategy being debated among conservation biologists is Assisted Migration.
保护生物学家们争论的最激进的策略是辅助迁移。
The finite difference depth migration equation in space-frequency domain can be derived when the radical expression is approximated by continued fraction.
采用连分式近似，可以得到空间频率域的有限差分深度偏移方程。
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