此外，信件通常发送到组织外部，而备忘录中通常是内部消息。
Further, letters are usually sent outside the organization, while memorandums are usually internal messages.
中国一个动物保护组织拯救了500多只被送到屠宰场的狗。
Over 500 dogs being delivered to a butcher house were saved by a Chinese animal protection organization.
然后他将切掉的组织送到实验室，在那里，实验员将检查被切除的组织的最外层，看它是不是被健康组织包裹着。
He then sends what he has excised to a laboratory, where pathologists sample all around the outside of the extracted mass to see if it is encapsulated by healthy tissue.
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