In such cases actively wait for a change in the market conditions before introducing an idea and use your best data monitoring and analytical techniques to guide your timing .
It is this need for a change of structure that makes recovery from a recession induced by financial crisis so difficult .
正是这种转变经济结构的需要，使得美国经济很难从金融危机所导致的衰退中复苏。
It 's time for a change .
现在正是该改变的时候。
Is it time for a change ?
现在是时候改变了吗？
After about five years in the army he was ready for a change .
在军中服役约五年后，他已经做好了改变的准备。
But we students have awakened and started to act for a change .
然而我们学生已经觉醒，开始为改变而行动起来了。
In the intellectual property space there have recently calls for a change in strategy and proposals for new laws covering innovation and intellectual property for green technology .