Compared with protocols under the CRS model, the group key exchange protocol can greatly reduce the risk of putting all trusts in one place.
和采用CRS模型的协议相比，降低了把整个信任集中于一处带来的风险。
A river sediment numerical model for gravel-pebble streams, CRS-1 model, is developed. The computed results by the model agree quite well with the data of flume experiment, model experiment and field.
开发了CRS - 1卵石河流泥沙数值模型，经水槽试验、模型试验、野外实测资料验证，计算结果与实测值吻合良好。
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