Reliance on these supplies and the difficulty of tracing their origins havae brought into question the ability of milk producers to ensure product safety.

乳品生产企业依赖这种奶源，而它们的来源又难以追踪，使人们对中国乳品生产企业确保其产品安全的能力产生了怀疑。

youdao

Tracing can be enabled on the Business Events side and on the integrating product side if the logs don't provide sufficient information to determine the cause of a problem.

如果日志提供的信息不足以判断问题的原因，可以在 Business Events 和集成的产品上启用跟踪。

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A traceability system is in place, including tracing back from the final product through quality control data and batch records to the raw materials used and the suppliers?

现场是否有可追溯体系，包括通过质量控制数据和批次记录，由最终产品追溯到所有的原材料和供应商？

youdao

In tracing developments from 1500 to 2000, it equated a nation's gross national product with its military, political and economic prowess.

CNN: Building On A Golden Age