We needed something that was portable, something that could be sterilized and reused across multiple babies and something ultra-low-cost, compared to the 20,000 dollars that an incubator in the U.S. costs.
这个工具需方便携带， 能够被消毒，并给不同的婴儿重复使用， 价格得极其便宜， 远低于两万美元， 这就是我们要设计的恒温箱。