justify 为……辩护，证明……正当（或有理，正确）
例：They found it hard to justify their son's giving up a secure and well-paid job.
他们很难理解儿子竟然放弃了收入颇丰的稳定工作。
派生词: justifiable 可证明为正当的；有道理的
justification 辩护；认为有理
migrate 迁移，移居（国外），转移
例：The audience for network television has been declining relentlessly as viewers have migrated to cable and the Internet.
派生词：migratory 有迁徙习惯的
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