Another research for us to pursue is what to be selected as "green" blowing agent and how to practice it.
另一个需要从事的研究是选择何种“绿色”发泡剂，以及如何实践它。
How to practice it: Next time you start a conversation, make an effort to ask the person you're chatting with at least three questions before making another observation of your own.
具体怎么做：下次在开始一段对话前，准备好三个问题，向对方发问，然后再发表你的看法。
How to practice it: Next time you start a conversation, make an effort to ask the person you're chatting with at least three questions before making another observation of your own.
具体怎么做：下次在开始一段对话前，准备好三个问题，向对方发问，然后再发表你的看法。
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