Once the diagram was added, three paragraphs of description became superfluous and were cut.
加入图示后，三段描述便成了多余，随即被删去。
Which choice best defines “superfluous”?
B — More than needed; unnecessary.. “superfluous” means More than needed; unnecessary..
Which word means “More than needed; unnecessary.”?
C — superfluous. “superfluous” means More than needed; unnecessary..
superfluous — More than needed; unnecessary.. In Chinese: 多余的；过剩的.
superfluous is pronounced //suːˈpɜːfluəs//.
Once the diagram was added, three paragraphs of description became superfluous and were cut. (加入图示后，三段描述便成了多余，随即被删去。)
unnecessary, redundant, surplus — all close in meaning to superfluous (More than needed; unnecessary.).
essential, indispensable — each the opposite of superfluous (More than needed; unnecessary.).
Yes. superfluous 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.
super(上) + flu(流) → 溢出来 → 多余。