pop out
近义词：burstout，comeout，protrude，bulge，pop，bugout，start，popin，
英英释义
Verb
- appear suddenly;
"Spring popped up everywhere in the valley"
- bulge outward;
"His eyes popped"
- exit briefly;
"He popped out for a quick coffee break"
- come out suddenly or forcefully;
"you stick a bill in the vending machine and the change pops out"