But with the genetic material of an extinct virus in front of them, researchers can recreate it in the lab.
如果摆在他们面前的是已经绝迹的病毒基因物质,研究人员就可以在实验室里重新造出这种病毒。
When changing these table attributes using SQL, it is no longer necessary to drop the table and then recreate it.
在使用SQL修改这些表属性时,不再需要删除表并重新创建它。
If you do decide to drop an index, you should first save its create index statement so that you can easily recreate it if necessary.
如果您决定删除索引,那么首先要保存它的CREATE index语句,以便在需要时轻松地重新创建它。
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