In truth, whether man introduces a foreign species intentionally or accidentally--because the climate, habitat and sources of food in its adopted land are all different from its native environment--the newcomer will have little chance to survive unless man feeds and cares for it.
事實上，動物不論是被人有意或無意地帶到一個陌生國度，因氣候、棲息環境、食物來源等生存條件與「故國山河」不同，除非人們細心豢養，大部分無法在野外自求多福，找到生存位置。