It's pretty hard to measure influence of written or visual material.
很难衡量书面或视觉材料的影响。
-- Ben Shahn 本·沙恩
It's pretty hard to measure influence of written or visual material.
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It's pretty hard to measure influence of written or visual material.
很难衡量书面或视觉材料的影响。
-- Ben Shahn 本·沙恩
