Those forced to exercise their smiling muscles reacted more enthusiastically to funny cartons than did those whose mouths were contracted in a frown, suggesting that expressions may influence emotions rather than just the other way around.
譯文：
那些被迫假笑的人對有趣的`卡通的反應要比那些被迫皺眉撅嘴的人更爲熱烈，這說明了表情或許可以影響情感，而不僅僅是情感影響表情。
分析：
本句是一個比較結構，句子的基本結構是Those…reacted…;比較連接詞than所引導的是比較狀語從句。主句與從句的結構對等：這句主語those的後置定語是forced to exercise their smiling muscles，從句主語those之後出現了定語從句whose mouths were contracted in a frown;從句中主語those的謂語動詞也是reacted，爲了避免重複就使用did替代，但由於“主語those + 定語從句”造成主語成分太長，謂語很短，爲了避免頭重腳輕，所以採取倒裝結構，即謂語did放置在主語those之前。句末又出現了分詞結構suggesting that…作爲整個句子的結果狀語，說明前面整個實驗的結論是什麼。該狀語成分中還包含一個賓語從句，而從句中的rather than結構是理解的重點，它是一個並列連詞，意思爲“而不是”。