每句先自己拆解（找主干 + 修饰），再点开参考译文核对。下面的框写你自己的翻译，导出时一并提交。
1. Cities that planted more street trees recorded a clear drop in residents' stress levels.
查看参考译文 ▾种了更多行道树的城市，居民的压力水平出现了明显下降。
2. However, air quality in those same districts did not improve noticeably, because traffic emissions remained high.
查看参考译文 ▾然而，那些同一区域的空气质量并没有明显改善，因为交通排放仍然很高。
3. A study of university students found that those who slept fewer than six hours performed worse on memory tests than those who slept eight.
查看参考译文 ▾一项针对大学生的研究发现，睡眠少于六小时的人在记忆力测试中的表现，比睡八小时的人更差。
4. Most participants also said they felt tired the next day.
查看参考译文 ▾大多数参与者还表示，他们第二天感到疲惫。
5. Solar panels have become cheaper over the last decade.
查看参考译文 ▾在过去的十年里，太阳能板变得更便宜了。
6. Nevertheless, solar energy alone cannot meet a country's total power demand at night.
查看参考译文 ▾尽管如此，仅靠太阳能无法满足一个国家在夜间的全部电力需求。
7. After the city library extended its opening hours, visits by students increased by 40%.
查看参考译文 ▾在市图书馆延长开放时间之后，学生的到访量增加了 40%。
8. Not all heart disease, however, is caused by diet; some cases are mainly genetic.
查看参考译文 ▾然而，并非所有的心脏病都是由饮食引起的；有些病例主要是遗传性的。