surrogate species的用法和樣例：
例句
- This article described three approaches to implementing a surrogate key as primary key.
本文描述了實(shí)現作為主鍵的代理鍵的三種方法。 - Surrogate motherhood is among the latest in a long list of roles being outsourced to India, where rent-a-womb serices are far cheaper than in the West.
代孕母親是印度許多代理角色中最新的一種，在印度，出租子宮比在西方要便宜得多。
