"Dodge a bullet" means "to avoid something negative". Example: I know you wanted to date George, but he wasn’t interested in you. I think you dodged a bullet because I heard he treats his girlfriends really badly.
"Race against time" means "to do something very quickly". Example: We had to race against time to finish the project before the deadline. Want to learn English? Choose your topic here: learzing.com #idiom #idioms #saying #sayings #phrase #phrases #express