每当“城市森林之友”（FUF）通知他们有树木需要帮助时，他们就开始工作。
They set out to work whenever the FUF informs them of a tree in need.
每当有研究成果面世时，人们需要提出一组简单的问题；患者同样可以向医生询问这些问题。
People need a simple set of questions to ask every time results are presented; patients can ask their doctor these same questions.
每当有顾客找到李雄飞时，他都会询问一些细节问题，比如他们彼此如何相识，在一起有多久，以及他/她为何需要结束这段恋情。
Every time a client comes to Li, he asks details including how they met, how long they’ve been together and why he or she needs to end the romance.
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