That is a plastic tarp and they are covering the field. It will keep the field from getting too wet.

那是塑料篷布，他们在盖球场呢，那个能让球场避免太潮湿。

One is computer scientist Chris Johnson who I see as someone who helps keep the field honest.

一位是计算机科学家 Chris Johnson， 我认为他有助于保持该领域的诚实。

But the three of you must keep the field. I buried some treasure there. Find it, dig it out, and share it together.

但是你们三个必须留在园子里。我在那里埋下了一些财宝。只要你们找到并挖出财宝，你们就可以拿去分了。