Are the maps being used by multiple threads without external synchronization?

是图没有外部同步多个线程使用？

youdao

Let the users of these objects determine whether external synchronization is necessary.

这些对象应该由其用户决定是否需在外部同步。

youdao

An advantage to message passing is that it ties synchronization to data instead of tying it to an external synchronization object.

消息传递的优点是它将同步绑定到数据，而不是绑定到外部的同步对象。

youdao

"When I started this company, I talked about faulty external hard drives and the outrageous fees for limited file synchronization services, " said Tony Gauda, Bitcasa CEO.

ENGADGET: Bitcasa leaves beta, offers discount on Infinite Drive to celebrate