One notable instance of volcanic adaptation is the sulfur-eating bacteria thriving in the hot springs of Yellowstone National Park.
火山适应性的一个显著实例是在黄石国家公园温泉中繁盛的食硫细菌。
A survey of office workers found that employees who had access to adjustable-height desks reported similar levels of reported back pain to employees without one, but employees with adjustable desks reported significantly fewer instances of feeling physically restless during long meetings.
From a Inferences question · Information and Ideas
Which choice best defines “instance”?
B — An example or single occurrence of something. “instance” means an example or single occurrence of something.
Which word means “an example or single occurrence of something”?
C — instance. “instance” means an example or single occurrence of something.
instance — an example or single occurrence of something. In Chinese: 例子，实例.
instance is pronounced /ˈɪnstəns/.
One notable instance of volcanic adaptation is the sulfur-eating bacteria thriving in the hot springs of Yellowstone National Park. (火山适应性的一个显著实例是在黄石国家公园温泉中繁盛的食硫细菌。)
example, case, occurrence — all close in meaning to instance (an example or single occurrence of something).
Yes. instance 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.