更高的储备量是抵抗经济命运矢石的保险单。

Higher reserves are an insurance policy against the slings and arrows of economic fortune.

到了魏晋南北朝时期，随着中原王朝与东北关系的密切，魏晋史家以“楛矢石砮”为依据，断定古肃慎位于东北的北部。

The historian came to a conclusion that the Sushen located at the north of the Northeastern areas on the basis of the record about "the arrow made of thorn and cluster of stone-arrow".