血

The causes of failure were discussed and the preventive measures were also brought forward in this paper.

本文对这两种并发症的发生原因和防治措施进行了讨论。

Solidago Canadensis L.1. The risk analysis was abided by the pest risk analysis criterion which was formulated by FAO and IPPC in order to establish the judgement index system of risk quantitative analysis on Solidago Canadensis L.

本文遵照联合国粮农组织国际植物保护公约的有害生物风险分析准则，构建了加拿大一枝黄花风险分析评估量化分析评判指标体系，并确定了各指标的评判标准和等级。