NASA scientists had tried to solve the problem by designing new tools for use in space.

VOA: special.2009.06.24

This is what we'll do typically in the class, we'll have new tools.

这门课要经常用它们,我们会不断引入新的工具

耶鲁公开课 - 博弈论课程节选

McDivitt tried one of the new tools.

VOA: special.2009.06.24

"But the important question is whether or not you need that information and our view very strongly is that,you know, all of that type of information that is relevant to the conservation and management of whales can be gathered using new and very powerful non-lethal tools."

VOA: standard.2010.01.05