研发过程中最棘手的问题，是美术人员的频繁流失。小公司待遇有限，美术来了又走，无人接手时，波波只能亲自上阵画素材应急，这也是如今游戏里残留着多种美术风格的原因。
The customer-funded advantage
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Advances in organ and computer models are raising the prospect that some animal experiments could be eliminated. But there are still huge hurdles to overcome.
The Pipistrelles emerge first, flying around for a few minutes, before squeezing out through minute gaps around the church door.
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