I went on a month-long trip to Europe.

I had to say goodbye to my best friend, we've been friends for so long.

In the long run, hard work always pays off.

He finally achieved his long-held dream of becoming a doctor.

So long as you study hard, you will pass the exam.

She had a long face when she heard the news.

I'm looking forward to the long weekend to relax and unwind.

LED lights are energy-efficient and long-lasting.

I made a long-distance call to my family in another country.

Long time no see!