The cloud condition suitable for seeding, its monitoring method and optimum seeding location, agent and dosage were discussed according to the new mechanism.

与此相应提出了适合人工增雨的云层条件、监测识别方法以及最佳催化部位、药剂、剂量等。

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Other issues, Trenberth says, are the cost and the location: Should sulfur dioxide seeding be global, or more localized to target specific parts of the planet?

其他问题，还包括成本和定位：是应该进行全球性撒播二氧化硫，还是定位后投射到特定目标区域？

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Among other mysteries, self-seeding may explain why tumors sometimes regrow in the same location after being surgically removed: not necessarily because surgeons failed to remove part of the original tumor but because some itinerant cancer cells returned later to their original home to start a new tumor in the same place.

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