Developing the tests to do this study without further endangering chimp populations took seven years.
Developing the tests to do this study without further endangering chimp populations took seven years.
通过测验进行使黑猩猩免于更深的灾难的研究花了七年的时间。
Developing the tests to do this study without further endangering chimp populations took seven years.
通过测验进行使黑猩猩免于更深的灾难的研究花了七年的时间。