Then the cycle was adjusted and rats were required to press the lever twice to get a single dose.

接着，调整实验条件，小鼠们必须按操作杆两次才能得到一剂药物。

youdao

Then the cycle was adjusted and rats were required to press the lever twice to get a single dose.

接着，调整实验条件，小鼠们必须按操作杆两次才能得到一剂药物。

youdao