The barriers to entry are low, and the barriers to exit are low. A lot of people are trying things.
进场出场的门槛都很低，会有很多人来尝试。
Market Specific Factors: Barriers to Entry and Exit
市场特定因素：进出壁垒
Secondly, we studied the market barriers systematically which are now circumscribed to greenfield entry and closedown exit.
第二，对主要作用于新建进入和关闭退出的市场壁垒进行了系统的分析。
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