By this we mean poor diet and physical activity and obesity, but history offers a depressing picture.

在这个问题中我们是指不良饮食,缺乏运动和肥胖,但历史情况不容乐观

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

That's a very difficult challenge in the Senate right now. It's not looking very good these days,

目前这在参议院是很大的挑战。现今的形势看上去不容乐观。

对全球变暖的政策 - SpeakingMax英语口语达人

Hawthorne wrote a short story you should read sometime, as a balance to all of this optimism of this period, irresistible as that optimism was.

霍桑写了篇短文,有机会你应当读读看,他给那个狂热乐观主义时代打了一针清醒剂,因为那是种不容抗拒的乐观

耶鲁公开课 - 美国内战与重建课程节选

Whatever the details might be, we could describe lives and say, whether or not their life was good as a whole, what the future holds out for them is negative.

不管详细情况是什么，我们可以把他们的生活形容为，不管他们一生的生活是否美好，他们的未来都是不容乐观的。

耶鲁公开课 - 死亡课程节选

Half of them receive a kind of unfavorable evaluation.

而另一半的结果不容乐观。

耶鲁公开课 - 心理学导论课程节选