对老鼠的研究在评估人类的影响方面可能很有用处，因为对人的研究会受到复杂的令人困惑的因素所限制，其中可能包括吸烟、财富或城市生活。
Rat studies can be very useful in assessing human effects, because studies of people can be hampered by complex confounding factors which could include cigarette smoking, wealth or urban living.
对老鼠的研究在评估人类的影响方面可能很有用处，因为对人的研究会受到复杂的令人困惑的因素所限制，其中可能包括吸烟、财富或城市生活。
Rat studies can be very useful in assessing human effects, because studies of people can be hampered by complex confounding factors which could include cigarette smoking, wealth or urban living.
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