For the time before records began, we have only "proxy records" reconstructed largely from tree rings and ice cores, supplemented by a few incomplete writtenaccounts.
在开始有记录之前，我们只有主要根据年轮和冰芯重建的“代理记录”，还有一些不完整的书面记录作为补充。
2
He even looked at other writtenaccounts.
他甚至还看了其他著作。
3
Prepare estimates and writtenaccounts of work performed.