火焰切割机的价格比较低，同时前期投入成本也较低。
The price of flame cutting machine is lower, and the cost is low.
很明显，可再生能源的运营成本很低，但是前期投入很高。
Almost by definition, renewable energy sources have low running costs but high up-front costs.
必须要更小更便宜，那会意味着第二轮Figaro的前期投入全部作废。
No, it had to be much smaller, and cheaper, which meant all of the work put into Figaro was to be scrapped in favor of newer, more portable designs.
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