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随着时间的推移，人类继续开动脑筋，发现了更多的杠杆作用。
As time went on, humans continued to use their brains to develop more leverage.
youdao
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詹妮：我们已经等了很长时间了我们什么时候能开动啊？
Jenny: we have waited for a long time. When will we start?
youdao
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詹妮：我们已经等了很长时间了我们什么时候能开动啊？
Jenny: we have waited for a long time. When will we start?
youdao