When the grace peroid expires, the contract is annulled。
当这个宽限期届满，你仍未执行合同的话，该合同就终止了。
The safe situation classification of reactor is second class. The detection peroid is 6 years.
反应器安全状况等级为二级，检定周期定为6年。
Result: hemostasis rate of sandostain was85.7% the average peroid of hemostasis was clearly longer than pituitrin .
结果：善得定止血率85。7%，平均止血时间明显优于垂体后叶素。
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