But underlying them are certain key values about what is worth learning and what is not.

但它们背后却有着一些关于什么值得/不值得学习的重要价值观。

We're a generous people, and one of our key values is our generosity. And we help those when they're in need.

美国是慷慨的民族，我们重要的一个价值观就是慷慨待人。所以我们会帮助那些有需要的人。

Now, just like WAV files, BMPs start with metadata, including key values like image width, image height, and color depth.

现在，就像 WAV 文件一样，BMP 以元数据开始，包括图像宽度、图像高度和颜色深度等关键值。