对所有的产品管理任务排列等级。
这些研究结果是根据性能等级排列的。
The findings are arranged in rank order according to performance.
四种常绿乔木的除尘能力等级排列为：云杉，针刺杜松，圆柏和柏油松。
The dusts-removing abilities of four types of evergreen trees are ranked as: spruce, needle juniper, Sabina chinensis, and pitch pine.
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