在15世纪早期，人们发明了螺旋弹簧或均力圆锥轮，尽管它的主弹簧的张力不断变化，但仍能对计时装置的齿轮保持恒定的力。
In the early 1400s came the invention of the coiled spring or fusee which maintained constant force to the gear wheels of the timekeeper despite the changing tension of its mainspring.
从第二轮开始，他转入防御，倚靠伸缩绳来吸收对方的功击力。
From round two he went defensive, leaning on the slackened ropes to absorb blows.
但收益很可能受到限制，而且有可能使新型经济体的生命力由于受到新一轮资金的涌入而受到影响。
But the benefits are likely to be limited, and it might complicate life for emerging economies which could face a fresh surge of capital inflows.
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