Mature breeding birds are very expensive - even a fertilised ostrich egg isn't cheap so you need quite a bit of capital to begin with.
周到的养殖鸟类非常昂贵，甚至繁殖鸵鸟蛋不便宜，所以你需要许多资金才能开始。
These are fairly cheap, making a potential treatment very affordable – especially when you consider the overall costs of blindness, " Dr Krisztina Valter says."
这是相当便宜的，使一个潜在的治疗非常实惠 -尤其是当你考虑失明的总成本，“克里斯蒂娜瓦尔特博士说。
You can easily get eggs at any supermarkets, and they are sold for a very cheap price too.
你能容易地在任何的自选市场拿蛋，而且他们也被以非常廉宜的价格卖。
You can easily get eggs at any supermarkets, and they are sold for a very cheap price too.
你能容易地在任何的自选市场拿蛋，而且他们也被以非常廉宜的价格卖。
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