The scientist deliberately varied the temperature in each trial to isolate its effect on the chemical reaction rate.
科学家故意改变每次试验的温度，以分离其对化学反应速率的影响。
Naked mole rats are unusual among mammals in that they rarely develop cancer, even when researchers deliberately expose their cells to substances known to trigger tumors in other rodents.
From a Central Ideas and Details question · Information and Ideas
Which choice best defines “deliberately”?
B — Done on purpose. “deliberately” means done on purpose.
Which word means “done on purpose”?
A — deliberately. “deliberately” means done on purpose.
deliberately — done on purpose. In Chinese: 故意地.
deliberately is pronounced /dɪˈlɪbərətli/.
The scientist deliberately varied the temperature in each trial to isolate its effect on the chemical reaction rate. (科学家故意改变每次试验的温度，以分离其对化学反应速率的影响。)
intentionally, purposefully, willfully — all close in meaning to deliberately (done on purpose).
accidentally, unintentionally — each the opposite of deliberately (done on purpose).
Yes. deliberately 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.