二者主要不同在于：1。杂交不育；

But differed from the latter in: (1).

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与RBAC中URA的主要不同在于委托中的URA及其撤销主要是由委托者自己完成，而RBAC中的URA及其撤销主要是由系统管理员或安全管理员完成。

The main difference between URA and it's revocation in delegation and RBAC is that the former is mainly performed by delegator and the latter by system administrator or security administrator.

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药麻和睡眠时脑游离氨含量降低，针麻与药麻的最主要不同在于前者处于清醒状态，后者处于抑制状态，但在外科手术上针麻往往能收到药麻时同样的镇痛效果。

Studies have been made on the changes in ammonia content of different regions in the brain of the mice during suppression of pain by electro -acupuncture. The results obtained are as follows: 1.

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药麻和睡眠时脑游离氨含量降低，针麻与药麻的最主要不同在于前者处于清醒状态，后者处于抑制状态，但在外科手术上针麻往往能收到药麻时同样的镇痛效果。

Studies have been made on the changes in ammonia content of different regions in the brain of the mice during suppression of pain by electro -acupuncture. The results obtained are as follows: 1.

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