fall not off

基本解释

If the skull does not fall off, the fox will be transformed into a human:”’4
髑髅不坠，则化为人矣。
Something like this: the kite must have a ribbon, because it can make a kite floating in the air at the steering wheel will not fall off.
原来是这样的：风筝都必须要有飘带，因为这样才能让漂浮在空中的风筝掌握方向，不会掉下来。
However, the diameter of the filling groove (34) is smaller than the diameter (D) of the ball, thereby the ball (25) does not fall off.
然而，填充槽（34）比滚珠直径（D）略小，使得滚珠（25）不会脱落。
ip.com

The glassblower must turn the pipe constantly so that the thick liquid glass does not fall off the end.
The cowboys try not to fall off.

David Burnham, a co-director of TRAC, told The Huffington Post that the fall-off in financial fraud prosecutions most likely does not reflect a fall-off in financial fraud itself.
FORBES: Not Prosecuting the Banks
Be careful not to fall off your own cliff.
FORBES: The Basic Communication Errors That Lead to the Fiscal Cliff Showdown and Your Own Misunderstandings