Click to listen and practice.
A tongue-twister is a phrase that is designed to be difficult to articulate properly, and can be used as a type of spoken (or sung) word game.
Betty bought some butter, but the butter Betty bought was bitter,
so Betty bought some better butter, and the better butter Betty bought was better than the bitter butter Betty bought before!
贝蒂买了些黄油，但贝蒂买的黄油是苦的，所以贝蒂买了点更好的黄油，贝蒂买的好黄油比贝蒂之前买的苦黄油更好！