更值得关注的是技术迭代风险。机器人更新换代速度较快，新款产品一旦性能更好、价格更低，旧设备的租赁吸引力会迅速下降。设备折旧不仅来自物理损耗，更来自技术代差。
In a single-level cell (SLC), there are two states: minimal/no trapped electrons, typically representing a ‘1’, erased state vs. a specific number of trapped electrons, representing a ‘0’, programmed state.，推荐阅读PDF资料获取更多信息
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The second, more thorough option is to stop using CSV altogether and switch to Parquet. Parquet is columnar and schema-aware. There's no delimiter character, so embedded commas, newlines, quotes — all of it just works. Redshift's COPY command supports Parquet natively and actually performs better loading it than CSV.
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执行，是实现公平正义的“最后一公里”。