Those forced to exercise their smiling muscles 18 more enthusiastically to funny cartoons than did those whose mouths were contracted in a frown, 19 that expressions may influence emotions rather than just the other way around.
被迫更积极地使用微笑肌肉观看搞笑卡通的第 18 组比嘴巴皱成皱眉的第 19 组更热情，这表明表情可能影响情绪而非仅仅是情绪影响表情。
Practically every week features at least one celebrity mom, or mom-to-be, smiling on the newsstands.
几乎每一周都会在新闻架上出现至少一位明星妈妈或即将成为妈妈的明星微笑着的形象。
If we know we will overreact to consumer products or housing options when we see a happy face (one reason good sales representatives and real estate agents are always smiling), we can take a moment before buying.
如果我们知道在看到一张笑脸时，会对消费品或住房选择产生过度反应（这也是为什么优秀的销售人员和房地产经纪人总是面带微笑的原因之一），那么在购买之前我们可以稍作停顿。
before looking into the container, smiling, and exclaiming, "Wow!
在查看容器、微笑并惊叹"哇！"之前
As a historian who's always searching for the text or the image that makes us re-evaluate the past, I've become preoccupied with looking for photographs that show our Victorian ancestors smiling (what better way to shatter the image of 19th-century prudery?).
作为一名总是寻找能让我们重新审视过去的文本或图像的历史学家，我开始着迷于寻找那些展示我们维多利亚时代祖先微笑的照片（还有什么比这更能打破19世纪保守刻板的印象呢？）。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。