It's a woodcut image from Blast.

这是《暴风》中的一幅木雕版画。

耶鲁公开课 - 现代诗歌课程节选

yeah, just picked it up quick and had a blast.

是，我就这么开始攀岩，玩得很过瘾。

攀岩的刺激 - SpeakingMax英语口语达人

So that right now is going to seem a little bit like a sudden blast of notation, so let's just remind ourselves what we really care about is the idea, it's not the notation, and let's spend the next half hour applying these ideas to an application.

这些看起来就是一些,毫无意义的表达式是嘛,为了更好地学习这些概念,而不是这些表达式呢,接下来的半小时,我们来联系实际

耶鲁公开课 - 博弈论课程节选