词典释义：
从最底层做起；从头学起
Control from the bottom up.
由下而上的控制。
We need to do this from the bottom up.
我们需要自底向上来做这件事。
All of these layers depend on each other from the bottom up.
所有这些层自底向上彼此依赖。
Allow genuine emissions markets to evolve from the bottom up.
让真正的排放市场自下而上发展。
starting at the lower end or beginning of a hierarchy or process and proceeding to the top
从最底层做起；从头学起
我们从头学历史。
We used to do what we call stick-built carriers, when you build every piece into the dry dock and build a carrier from the bottom up.
我们曾经做着被我们称为构建式的，每当你在船坞里做成一件产品生产出一辆航空母舰。
《America Revealed》《透视美国》
