这个计划需包含研究背景、一个可试验的假说及数个实验(需有控制变因)，以测试假说。

The proposal will consist of a summary of the background, a testable hypothesis and a couple of experiments (with crucial controls) to test this hypothesis.

youdao

科学，尽可能简明地来概括的话，它是一项有组织系统化的事业，它集合世界上所有的学科，并把这些学科知识浓缩成可试验的规律和原理。

Science, to put its warrant as concisely as possible, is the organized systematic enterprise that gathers knowledge about the world and condenses the knowledge into testable laws and principles.

youdao

目前为止，人类还没有接受过这样的移植手术，但未来两到五年内会有一些打印好的可替代器官进入人体试验进程。

So far, none of those bodies have been human, but a few types of printed replacement parts could be ready for human trials in two to five years.

youdao

You could do that with a relatively small number.

这个试验可在一个相对较小的范围内开展

耶鲁公开课 - 生物医学工程探索课程节选