椎旁肌间隙入路的操作学习曲线短，配合微型拉钩等简单手术器械相对于微创扩张管道更容易推广。
Wiltse approach learning curve is short, with a simple micro-hooks and other minimally invasive surgical instruments relative to the expansion chamber is more easily replicable.
在简要回顾对曲线走势有重要影响的宏观经济政策之后，提出当前应当逐渐由扩张性财政政策向中性的财政政策转变。
We think that transition ought to start from expansionary fiscal policy to Neutral fiscal policy, after brief review to some macro-economic policy which had important influence on the curves.
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