在结果颁布以前，COMAP会花几个星期来评判所有的赛题解决方案及处理比赛结果。
It will take several weeks for the judges to evaluate the solutions and for COMAP to process the results.
俄罗斯是小麦出产和供应大国，在出口禁令颁布以前，市场对俄罗斯小麦收成的预期已经有数个星期不断下降。
The export ban by Russia, a major producer and supplier to other countries, comes after several weeks of deteriorating prospects for the Russian wheat crop.
几天以前，为给即将到来的奥运会营造一个舒适的环境，北京颁布了一个在公共场所禁烟的法令。
Few days ago, Beijing issued a regulation to prohibit public smoking, in order to create a comfortable circumstance for the coming Olympics.
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