生态学家通常把外来物种定义为人们偶然或故意带到新地方的物种。
Ecologists generally define an alien species as one that people, accidentally or deliberately, carried to its new location.
三者中的每一处，地方的和外来的各种文化力量都给人们日常生活添加了独特的神韵，期间大多有苦有甜。至少在城市国际化进程到达顶峰时如此。
In each of these places, a great array of cultural forces, both local and external, lent a unique, often bittersweet texture to daily life, at least when cosmopolitanism was at its height.
伊拉克在2011年仍然是不安全的地方，对伊拉克人和外来者而言都是如此。
Iraq will still be a dangerous place in 2011, for Iraqis and outsiders alike.
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