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On the inner shelf, the main geomorphic types have mamelon and pit-and-pots.
在内部架子上，主要的地貌类型有小圆丘和坑坑洼洼。
The main function of preservatives is to prevent microbial growth and to ensure a long shelf life.
防腐剂的主要功能是防止微生物的生长，保证香波的仓库储藏时间。
The whales are known to only feed in summer and their main feeding area is in the Piltun Bay which lies at the north eastern part of Sakhalin shelf.
BBC: Gray whales granted rare reprieve
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