指数必须是积极 index must be a positive
你必须始终积极 You must always be active
索引必须是一个积极的 index must be a positive
问题像滚雪球一样越积越多，你必须不断适应新的情况。
Problems snowball and you have to constantly adapt to new situations.
台积电还表明了摩尔第二定律的必然结果：即使最大的芯片制造商也必须保持扩张。
TSMC also illustrates a corollary of Moore's Second Law: even the biggest chipmakers must keep expanding.
每次咳嗽前应该大口地吸气。咳嗽时必须大力而且要持续地咳嗽，就好像使劲全力要把胸腔里的积痰咳出来一样。
A deep breath should be taken before each cough. The cough must be deep and prolonged, as when producing sputum from deep inside the chest.
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