Medium-level (typed ops)
# 'located_in': [('Apple', 'Cupertino')]
。关于这个话题，PDF资料提供了深入分析
Define named ports and devenv finds free ones automatically:
When Nicholas Bowman was in high school, he thought his next steps were already mapped: He’d get a college degree and land a stable, high-paying job—enjoying the kind of economic mobility higher education has long promised.