There's nothing at all wrong with puzzlingout how a space elevator could get built.
苦苦思索如何建成太空升降机梯其实是完全无可厚非的。
2
Indeed, scientists are puzzlingout the connections between musical training in childhood and language-based learning - for instance, reading.
事实上，科学家对童年时期的音乐训练和以语言为基础的学习——比如阅读之间的联系迷惑不解。
3
Munk decided to tackle the problem on his own, puzzlingout the physics of how storms generate swells and what happens as they hit a beach after crossing thousands of kilometres of open water.