<span style、" font-family: 微软雅黑; font-size: small;">压力机制</span>
<span style、"font-family: 微软雅黑; font-size: small;">动力机制</span>
<span style、"font-family: 微软雅黑; font-size: small;">环境影响机制</span>
<span style、"font-family: 微软雅黑; font-size: small;">约束机制</span>