好的，这是逐句翻译：
On October 30, 2019, 3M announced the results of its 2019 Young Scientist Challenge.
2019年10月30日，3M公司公布了2019年年轻科学家挑战赛的结果。
14-year-old Kara Fan’s spray-on bandage beat out several other creative solutions to some of the world’s biggest problems.
14岁的Kara Fan设计的喷雾绑带击败了其他几个创造性解决方案，解决了一些全球最大的问题。
The contest, which is run by 3M and Discovery Education, is open to students in grades 5-8.
这项由3M公司和Discovery Education举办的比赛面向5到8年级的学生开放。
Hundreds of kids sent in ideas on video.
成百上千的孩子通过视频提交了他们的创意。
In June 2019, 10 finalists were chosen based on their knowledge and ability to share their idea clearly.
2019年6月，10名决赛选手根据他们的知识和清晰表达创意的能力被选出。
The finalists were matched with a scientist.
决赛选手们与一位科学家配对。
Students were given several months to improve their projects with the help and advice of these scientists.
学生们有几个月的时间，在这些科学家的帮助和建议下改进他们的项目。
In October 2019, the finalists finally met their scientists and other students face to face at 3M’s special science center in St. Paul, Minnesota.
2019年10月，决赛选手们终于在明尼苏达州圣保罗的3M特别科学中心与他们的科学家和其他学生面对面见面。
The students expressed their views in the group, and the winners were announced.
学生们在小组中表达了他们的看法，获胜者随之宣布。
Kara Fan from California won the big prize for a special liquid bandage she created.
来自加利福尼亚的Kara Fan凭借她发明的特殊液体绑带赢得了大奖。
It can be sprayed on cuts and wounds.
它可以喷洒在割伤和伤口上。
One important part of Kara’s bandage is nano-silver (纳米银)—silver in extremely tiny form.
Kara的绑带一个重要部分是纳米银——以极小形式存在的银。
Kara had to do a lot of research to get that part just right.
Kara需要进行大量的研究，以确保这一部分做得完美。
For winning, Kara got $25,000.
因为获胜，Kara获得了25,000美元的奖金。
这就是逐句的翻译。如果你有其他问题或者需要进一步的帮助，请随时告诉我！
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On October 30, 2019, 3M announced the results of its 2019 Young Scientist Challenge. 14-year-old Kara Fan’s spray-on bandage beat out several other creative **solutions** to some of the world’s biggest problems.
The contest, which is run by 3M and Discovery Education, is open to students in grades 5-8. Hundreds of kids sent in ideas **on video**. In June 2019, 10 finalists were chosen **based on** their knowledge and **ability** to share their idea clearly.
The finalists were matched with a scientist. Students were given several months to improve their projects with the help and advice of these scientists.
In October 2019, the finalists finally met their scientists and other students face to face at 3M’s special science center in St. Paul, Minnesota. The students expressed their views in the group, and the winners were announced.
Kara Fan from California won the big prize for a special liquid bandage she created. It can be sprayed on cuts and wounds. One important part of Kara’s bandage is nano-silver(纳米银)—silver in extremely tiny form. Kara had to do a lot of research to get that part just right. For winning, Kara got $25,000.
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