通过理论推导，将群波分解为线性项和非线性项，讨论群波非线性项在不同水深条件下的影响情况。
Through theoretical analysis, group waves are decomposited into linear and nonlinear terms, in which the effect of each term is discussed under various water depth.
正如你在照片里看到的，华盛顿州斯波坎市一家银行办公室的窗台下面，生活着一群绿头鸭。
As you can see in the photo, a group of mallards lives under the windowsill of a bank office in Spokane, Washington.
正如你在照片里看到的，华盛顿州斯波坎市一家银行办公室的窗台下面，生活着一群绿头鸭。
As the photos in this post show, there are a lot of mallard ducks that live on a ledge underneath the offices of a bank in Spokane, Washington.
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