砂粒在波浪分选作用下从粉砂及粘土中分出。
The sand is separated from the silt and clay by wave sorting.
沉积物的分选和压实作用影响渗透率和孔隙度。
Sediment sorting and compaction influence permeability and porosity.
根据民意调查，大部分选民称希腊危机对于他们的决定起到一定作用。
In opinion polls, a majority said that the Greek crisis played a role in their decision.
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