Reducing the model to two variables made the problem tractable without discarding what actually mattered.
把模型简化为两个变量，使问题变得易于处理，又未舍弃真正关键的因素。
Which choice best defines “tractable”?
A — Easily managed; docile.. “tractable” means Easily managed; docile..
Which word means “Easily managed; docile.”?
D — tractable. “tractable” means Easily managed; docile..
tractable — Easily managed; docile.. In Chinese: 易驾驭的；温顺的.
tractable is pronounced //ˈtræktəbl//.
Reducing the model to two variables made the problem tractable without discarding what actually mattered. (把模型简化为两个变量，使问题变得易于处理，又未舍弃真正关键的因素。)
manageable, docile, workable — all close in meaning to tractable (Easily managed; docile.).
unruly, intractable — each the opposite of tractable (Easily managed; docile.).
Yes. tractable is on the SAT Prep Difficult list — the higher-register words that decide the hard questions. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
tract(拉) + able → 拉得动 → 好管。