N a sea in which the waves run directly against the course of a ship 有顶头浪的海
The partnership acknowledged in its report that there were numerous ways of determining the source of a river, including the furthest point from the sea or the head of the most dominant watercourse.
合作联盟在其报告里承认确定河流源头的方法有很多种，包括河流距离海洋的最远点，最大支流的源头等等。
The lack of ice also means that survivors will not have vital spots to rest when they head to sea.
冰块少也意味着海豹游向大海途中没有了必需的休憩之地。
The answer seems to be that, simply, late August is the period when polar bears in northern Alaska head north on to the sea ice, and that is what she was doing.
答案看起来是这样的：就因为八月底是阿拉斯加北部的北极熊游向北方的海冰的特定时段，文中这只母熊也正是这样做的。
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