Why america cannot see that it is losing traction

为什么美国看不到它正在失去牵引力？

With software monitoring each wheel , stability and traction control can also be built-in .

通过软件监控每个车轮，稳定控制系统和牵引力控制系统也能安装到车子上。

Solution look for snow that 's been packed down-it will provide better traction .

选择雪压实的马路，可以提供更好的摩擦力。

So the fed will find it even harder to get traction this time .

所以，美联储这一次更加难以牵引经济复苏了。

Another potential disappointment is a lack of traction on the various reforms the g20 mooted over a year ago .

另一个可能令人失望之处在于，g20一年前提出的种种改革缺少牵引力。