【上榜了！謝謝阿和摩友們！】評論
42 But then, our smiles senda message back to the brain that makes us feel even happier有比較級代表前面句子要有原形(D)In other words, we smile because something happens that makes us happy. --原形In other words, we smile because something happens that makes us happy.But then, our smiles send a message back to the brain that makes usfeel even happier換言之，我們微笑是因為某些事的發生，而這些事使得我們快樂。但後來我們微笑的消息發送回大腦，使得我們感到更加的快樂。