ขนาดวิดีโอ: 1280 X 720853 X 480640 X 360
แสดงแผงควบคุมโปรแกรมเล่น
เล่นอัตโนมัติ
เล่นใหม่
Very helpful❤
also helpful seeing the guy mopping behind you
This was really helpful in actually seeing what goes on inside of the spectrometer. Thanks!
the speaker is so nervous that its kinda endearing
Very helpful❤
also helpful seeing the guy mopping behind you
This was really helpful in actually seeing what goes on inside of the spectrometer. Thanks!
the speaker is so nervous that its kinda endearing