an experimental air-conditioning system.

一种试验性的空调系统。

The technique is experimental, but the list of its practitioners is growing.

该技术是实验性的，但采用者的人数在不断增加。

the main techniques of experimental science.

实验科学的主要技术。

the use of experimental animals.

实验动物的使用。

We have experimental and observational evidence concerning things which happened before and after the origin of life.

关于生命起源前后的情况，我们通过实验和观察获得了相关证据。

The senator is ready to argue for an experimental lifting of the ban.

该参议员已准备好争取试行解除那条禁令。