实际的强度水平取决于诸如大城市的物理布局、人口密度和生产活动之类的因素。
The actual level of intensity depends on such factors as the physical layout, population density, and productive activities of a metropolis.
参考最终的产量损失，与实际生产者关注的重点结合紧密，便于指导农业生产活动。
Consulting the final crop yield to increase and decrease, combine with real producers' close attention to the thing close, so it is benefit to guide the activity in production.
参考最终的产量损失，与实际生产者关注的重点结合紧密，便于指导农业生产活动。
Consulting the final crop yield to increase and decrease, combine with real producers' close attention to the thing close, so it is benefit to guide the activity in production.
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