How can i use the python of the anaconda environment when I use "rosrun" to run a python file in ROS Noetic

I want use the python of the anaconda environment when I use ROS Noetic.But I found that even if the virtual environment is activated at the terminal，whether "rosrun" or "roslaunch" uses the Python for my Ubuntu system,like"usr/bin/python3".However,when I use "python script_name.py" in the same terminal,it can use the python of the anaconda environment correctly.Is this normal？If anaconda is not used, deploying deep learning in ROS may not feel very convenient.