（一）合同在受胁迫或者危险情况的影响下订立，并且合同条款显失公平；
Архаичное компьютерное поверье получило научное подтверждение14:59
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Администрация США определила сроки операции против Ирана20:58
Given that specialization is still unstable and doesn't fully solve the coherence problem, we are going to explore other ways to handle it. A well-established approach is to define our implementations as regular functions instead of trait implementations. We can then explicitly pass these functions to other constructs that need them. This might sound a little complex, but the remote feature of Serde helps to streamline this entire process, as we're about to see.