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。业内人士推荐PDF资料作为进阶阅读
The way specialization works is as follows. By enabling #[feature(specialization)] in nightly, we can annotate a generic trait implementation to be specializable using the default keyword. This allows us to have a default implementation that can be overridden by more specific implementations.
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，详情可参考新收录的资料
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StackSocial prices subject to change.，这一点在新收录的资料中也有详细论述