unpremeditated

The unpremeditated crime that Picasso commits to oneself is downhearted, should destroy copperplate depict almost.

毕加索对自己犯的过失闷闷不乐, 几乎要将铜版刻画一毁了之.

This happy event--supposing it to be such--could only have occurred at an unpremeditated moment.

这件愉快的事情——就算它愉快——只能发生在毫无预谋的时刻。