1. 孤独的；寂寞的；孤单的
Someone who is lonely is unhappy because they are alone or do not have anyone they can talk to.
e.g. ...lonely people who just want to talk...
只想找人倾诉的孤独的人
e.g. I feel lonelier in the middle of London than I do on my boat in the middle of nowhere.
我身处伦敦市中心比驾船航行于茫茫大海更感到孤单。
2. （指状态或时期）孤独的，寂寞的，孤零零的
A lonely situation or period of time is one in which you feel unhappy because you are alone or do not have anyone to talk to.
lonely
e.g. I desperately needed something to occupy me during those long, lonely nights.
在那一个个漫长、孤单的夜晚，我极需找点事做。
e.g. ...her lonely childhood.
她寂寞的童年
3. 偏僻的；荒凉的；人迹罕至的
A lonely place is one where very few people come.
e.g. It felt like the loneliest place in the world.
感觉这就像是天底下最荒凉的地方。
e.g. ...dark, lonely streets.
昏暗偏僻的街道