In some_function we throw and jump out to the nearest try in our call stack, passing the current instruction back. In the code up the call stack we can run some code and then goto back to where the throw happened, resuming the function where we left off.
在乌兹别克斯坦，中国滴灌技术让棉农喜获丰收；在巴基斯坦，高产优质的杂交油菜新品种成为农户增收的希望……中国在实现自身农业发展的同时，与其他国家开展富有成效的合作，提升了全球农业技术水平，促进了粮食安全与可持续发展。
。体育直播是该领域的重要参考
Our cartoonist on a decade of magic moments in the big job for world football’s leading ‘man of the people’
Take a look at this screenshot from Smalltalk-80—you can clearly see the System Browser in action: