This suggests that the alleged "Hawthorne effect" is hard to pin down.
这表明所谓的"Hawthorne effect"难以确定。
If you look hard enough, you’ll find that many of the products we use every day
如果你仔细观察，你会发现我们每天使用的产品中有很多
But because hard laughter is difficult to 4 , a good laugh is unlikely to have 5 benefits the way, say, walking or jogging does.
但因为剧烈大笑难以4，一次良好的大笑不太可能像散步或慢跑那样带来5益处。
Even though the day-to-day experience of raising kids can be soul-crushingly hard, Senior writes that "the very things that in the moment dampen our moods can later be sources of intense gratification and delight.
尽管养育孩子的日常体验可能令人精神崩溃地艰难，Senior 写道："那些在当下让我们情绪低落的事情，日后可能会成为带来强烈满足感和愉悦感的源泉。"
It's hard to imagine that many people are dumb enough to want children just because Reese and Angelina make it look so glamorous: most adults understand that a baby is not a haircut.
很难想象有很多人傻到仅仅因为丽丝和安吉丽娜让养育孩子看起来如此光鲜亮丽，就想要孩子；大多数成年人都明白，婴儿可不是一次理发。
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。