But if the disturbance affects a large area, as a great earthquake can, the resulting seismic sea waves nay behave as if they had been generated along a line rather than at a point.
Their fins have adapted as limb like structures to allow them to remain stationary on the sea bed while causing minimal disturbance to the substrate and remaining totally camouflaged.
他们的鳍演化为类似四肢的结构，让他们在海床上保持稳定，尽可能减小与环境的差别，保持完全的潜伏。
3
Sea clutter is the undesired radar echoes from sea surface. The existence of sea clutter contribute a serious disturbance to the target detection performance of radar.