The combination of iron and carbon in precise proportions produces steel with remarkable tensile strength.
铁与碳按精确比例结合，可产生具有卓越抗拉强度的钢。
Which choice best defines “combination”?
C — Joining or mixing things together. “combination” means joining or mixing things together.
Which word means “joining or mixing things together”?
D — combination. “combination” means joining or mixing things together.
combination — joining or mixing things together. In Chinese: 结合，组合.
combination is pronounced /ˌkɒmbɪˈneɪʃn/.
The combination of iron and carbon in precise proportions produces steel with remarkable tensile strength. (铁与碳按精确比例结合，可产生具有卓越抗拉强度的钢。)
mixture, blend, union — all close in meaning to combination (joining or mixing things together).
separation, division — each the opposite of combination (joining or mixing things together).
Yes. combination is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. 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.
combine (combine) + ation (noun).