To be free from worry of food and clothing is still not enough.
做到不愁吃不愁穿还不够。
Clinical trials are very expensive. That is the worry of the researcher.
临床实验费用昂贵，这是研究者们所担心的。
Did you have to worry of these things when you were my age?
在您那个年代，您曾经担心过我们现在担心的事吗？
The biggest worry of all is that an unbalanced world may not get another chance.
最让人担忧的则是一个不平衡的世界可能再也没有机会了。
The biggest worry of all is that an unbalanced world may not get another chance.
最让人担忧的则是一个不平衡的世界可能再也没有机会了。
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