?双边替换

... systems alternatives 系统选择方案 two-sided alternative 双边替换 two-way alternative plow 翻转式双向犁 ...

[数]?双侧替换

... 双侧搜索 two-sided search 双侧替换 two-sided alternative 双侧条件 two-sided condition ...

?双侧对立假设

双侧对立假设（Two-Sided Alternative）：总体参数既可以大于又可以小于虚拟假设提出的值的一种检验方法。

?双侧备择

... Test statistic 检验统计量 (z、t或者卡方，都有公式) Two-sided alternative 双侧备择 Two-sided test 双向检验 ...