But mature wireless markets such as the U. S. are difficult for outsiders to crack.
但美国这样的成熟无线市场让外来者难以找到突破口。
Like most of its rivals, Goldman is a difficult institution for outsiders to understand.
和其大多数竞争对手一样，高盛很难让外人理解。
Like most of its rivals, Goldman is a difficult institution for outsiders to understand.
和其大多数竞争对手一样，高盛很难让外人理解。
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