We had to have a bit of a production line going, making up "tiger milk", washing baby bottles, and cleaning the floors.
我们必须要让生产线运转起来,调制“虎牌牛奶”、清洗婴儿奶瓶、清洁地板。
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Mice in this case are the first line of experimentation — the scientists hope to then expand the research out into other animals that can produce milk in bulk, like goats and cows.