经过许多费力的“研究”，完美啤酒的秘密最终被发现了。
After much painstaking 'research', the secret to the perfect pint may finally have been discovered.
化石燃料和毁林排放的碳分子滞留于大气中，经过许多世纪才能分解掉。
Carbon molecules emitted by fossil fuels and deforestation linger for many centuries in the atmosphere before breaking apart.
在 70 年代，UNIX 经过许多次改进，逐渐流行起来。
Through the 1970s, UNIX went through many iterations and steadily gained popularity.
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