在过去的二十年的大多数时候，人们一直把海运的主要价格指标波罗的海干散货指数作为国际贸易状况的晴雨表，它被用以衡量运输煤炭、铁矿石和谷物的大型船只的包租费用。
FOR most of the past two decades the main measure of shipping costs has been used as a guide to what is happening to world trade.
货物作业停留时间是衡量货车使用效率和运输组织效率的一项综合性指标。
The retention time of cargo operations is a comprehensive index to measure the goods vehicle operating efficiency and the transport organization efficiency.
三是采伐指标的限额和凭证运输制度；
Three is the cuts target quota and the certificate transportation system.
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