任天堂总裁岩田聪在网上的一封信中表示，这还是任天堂首次出现新产品发布不到六个月内便宣告降价的情况。
President Satoru Iwata said in an online letter it was the first time Nintendo has cut prices so much within the first six months of a product's launch.
海相残留盆地中，当有效烃源岩、有效储集体、有效封盖层系形成“三位一体”的有机配置时，即形成有效成藏组合。
In these basins, effective plays are established when effective source rocks, effective reservoir bod - ies, and effective covers are matched by "three units into one".
奥陶系风化壳上覆铝土质岩类，封盖条件好，有利于形成大型地层、岩性圈闭。
The Ordovician weathering crust has good sealing and covering conditions of aluminum rock on the top, favorable for formation of large-scale stratum and lithologic trap.
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