So there already are some approaches like this that are working, but there's more that needs to be done.

现在我们已经有相关的治疗方法,但还有很多地方需要改进

耶鲁公开课 - 生物医学工程探索课程节选

- I mean that-- what began as, ah we'll do this this weekend turned out to be like a 100-hour project to revamp this whole thing.

我是说，这周末我们要做的是,改进整个工程，但这可能需要花100个小时。

哈佛公开课 - 计算机科学课程节选