罗斯福明智地混合运用礼貌与严峻来解决这个困难。
Roosevelt solved the difficulty by judicious mixture of courtesy and sternness.
其次，不同型号的防冻液不能混合运用，以免惹起化学反响，生成沉淀或气泡，降低运用效果。
Secondly, different types of antifreeze can not be mixed use, so as not to cause chemical reactions, the formation of precipitation or bubble, reduce the use of results.
该团体将运用混合策略来实现其目标。
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