Also, if there is a chance that more than one thread might delete the object, the merged approach might not always work. In this situation, it is better to maintain separate synchronization objects.

同时，如果存在超过一个线程会删除对像，这种合并的方法可能会工作异常，在这种情况下，最好是分开维护同步对像。

youdao

Also, if there is a chance that more than one thread might delete the object, the merged approach might not always work.

而且，如果有一个以上的线程可能删除对象，合并方法不一定始终有效。

youdao