心脏移植曾经一度被认为是不道德的——你怎么可以在一个人的胸部开个洞,然后把心脏移植到另外一个人的身体里呢?
Heart transplants were once considered immoral–how could you open the chest cavity of one person and transplant the heart into the body of another person?
曾经一度,他们辛苦游说要加入北约。
移情作用曾经一度被认为是人类的专利。
open it up much later. Because they used to open it more earlier, much more earlier,
它的开放时间一度曾被延后。因为公园曾经的开放时间要早得多,
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