目前钱币市场潜在的问题仍然存在，管理问题仍未真正解决。
Some potential problems still exist in the market now, how to administrate it has unsettled yet.
首先回答消失，然后问题也消失，因为它们只能够一起存在，它们就好象一个钱币的两面，如果一面没有了，另一面也无法保留。
First answers disappear, then the question also disappears - because they can live only together. They are like two sides of a coin - if one side has gone, the other cannot be retained.
采用复变函数方法研究复合材料中的钱币状裂纹的轴对称传播问题。
The axisymmetric propagating problem of a penny-shaped crack in composite material is studied using complex function method.
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