Without precise measurements, it is impossible to determine the exact orbit of the newly discovered comet.
没有精确的测量，就不可能确定新发现彗星的精确轨道。
As a result, these spiders can visually distinguish prey from potential mates at distances that would be impossible for most other spider species relying primarily on vibration sensing.
From a Central Ideas and Details question · Information and Ideas
Which choice best defines “impossible”?
B — Not able to occur, exist, or be done. “impossible” means not able to occur, exist, or be done.
Which word means “not able to occur, exist, or be done”?
A — impossible. “impossible” means not able to occur, exist, or be done.
impossible — not able to occur, exist, or be done. In Chinese: 不可能的.
impossible is pronounced /ɪmˈpɑːsəbl/.
Without precise measurements, it is impossible to determine the exact orbit of the newly discovered comet. (没有精确的测量，就不可能确定新发现彗星的精确轨道。)
unfeasible, impracticable, unattainable — all close in meaning to impossible (not able to occur, exist, or be done).
possible, achievable — each the opposite of impossible (not able to occur, exist, or be done).
Yes. impossible 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.