如今，余光中笔下“一湾浅浅海峡”的乡愁已成为历史。
In these days the homesickness represented in "A strait of shallow water "Guangzhong Yu wrote in his poem has passed.
而在浅海环境中，由于到达垂直线列阵的声波并不满足平面波假设，其空间增益需要作出正确估计。
However, in shallow water, because the arrival signals of the vertical linear array are not plane waves, the spatial gain needs to be estimated properly.
我们可以看到，现在的湖底或浅海底部的沉积物中形成了波痕。许多沉积岩都含有类似这种波痕的特征。
Many sedimentary rocks contain such features as ripple marks, exactly like those we can see forming in sediments at the bottom of present-day lakes or shallow seas.
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