The constant hum of the laboratory's ventilation system allowed the researchers to focus on their delicate experiments without distraction.
实验室通风系统持续不断的嗡嗡声使研究人员能够专注于他们精细的实验而不受干扰。
Which choice best defines “constant”?
A — Not changing, continuous. “constant” means not changing, continuous.
Which word means “not changing, continuous”?
B — constant. “constant” means not changing, continuous.
constant — not changing, continuous. In Chinese: 恒定的，不变的.
constant is pronounced /ˈkɒnstənt/.
The constant hum of the laboratory's ventilation system allowed the researchers to focus on their delicate experiments without distraction. (实验室通风系统持续不断的嗡嗡声使研究人员能够专注于他们精细的实验而不受干扰。)
continuous, unvarying, perpetual — all close in meaning to constant (not changing, continuous).
variable, intermittent — each the opposite of constant (not changing, continuous).
Yes. constant 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.
con(all)+stant(stand)