例句：His friend was killed and he knows he is lucky to be alive.
You were lucky (that) you spotted the danger in time.
It was lucky for us that we were able to go.
Luckily for us, the train was late.
例句：So far I have had no luck with finding a job.
We wish her luck in her new career.
I knew I needed a bit of luck to win...
I had a lot of bad luck during the first half of this season...
例句：It's pot luck whether you get good advice or not.
I could hardly believe my luck when he said yes.
You're out of luck ─ she left ten minutes ago.