Precondition tests are handled by before advice, which is executed just before the corresponding method execution join point.

前置条件测试由before建议处理，该建议就在对应的方法执行连接点之前执行。

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If the breakpoint is set on a node, a red border frames the node and execution pauses just before the node executes.

如果将断点设置在节点上，该节点的图标边框变为红色，而且在执行该节点前程序暂停。

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Execution will break just before allocating the block, and you can backtrack to determine what routine was responsible for the bad call.

执行将恰在分配该块以前中断，您可以向回追踪以确定哪个例程执行了错误调用。

youdao

It is the last one he writes just three hours before his execution by the Nazis.

FORBES: A History of Food: Adam Gopnik's "The Table Comes First"