（一）包含两个以上涉及不同税率、征收率的业务；
Under the new API design, transforms should not perform any work until the data is being consumed. This is a fundamental principle.，详情可参考搜狗输入法2026
res[i] = stack.length ? stack.at(-1) - i : 0;，推荐阅读91视频获取更多信息
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