Check a few more times before you leave, so you don't forget half of it.
Tips
mistakes
The third character takes the là reading here, not luò. That reading means to leave something behind by accident: 我把伞落在车上了, I left my umbrella on the bus.
history
Recorded in 《红楼梦》, in a line about getting ready early so that nothing is missing at the last minute. The three and the four are not literal counts; they simply stand for one thing after another.
