Optimistic locking is kind of a misnomer - there is no actual lock.
乐观锁是一个误称，有没有实际的锁。
Locking objects has no effect unless the sheet is protected. To protect the sheet, choose.
只有当保护工作表时，锁定单元格才会生效。
There are no force requirements for double action locking devices.
对双活动锁定装置所需要的力没有要求。
There are no force requirements for double action locking devices.
对双活动锁定装置所需要的力没有要求。
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