While the main goal of the expedition was mapping the ocean floor, studying deep-sea currents was a secondary objective.
虽然探险的主要目标是绘制海底地图，但研究深海洋流是次要目标。
Which choice best defines “secondary”?
C — Less important than something else; coming after the first. “secondary” means less important than something else; coming after the first.
Which word means “less important than something else; coming after the first”?
D — secondary. “secondary” means less important than something else; coming after the first.
secondary — less important than something else; coming after the first. In Chinese: 次要的，第二的.
secondary is pronounced /ˈsɛkənˌdɛri/.
While the main goal of the expedition was mapping the ocean floor, studying deep-sea currents was a secondary objective. (虽然探险的主要目标是绘制海底地图，但研究深海洋流是次要目标。)
subordinate, minor, ancillary — all close in meaning to secondary (less important than something else; coming after the first).
primary, principal — each the opposite of secondary (less important than something else; coming after the first).
Yes. secondary 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.