He trudged home feeling lonely and let down.

　　他步履艱難地往家走，感到孤獨(dú)而沮喪。

　　She felt lonely and hopeless.

　　她感到孤獨(dú)絕望。

　　I don't get lonely now because I make the effort to see people.

　　我現(xiàn)在不覺得孤獨(dú)了，因?yàn)槲覈L試著與人交往。

　　They often have a lonely and solitary life to lead.

　　他們常常過一種獨(dú)居的孤獨(dú)生活。

　　I would imagine she's quite lonely living on her own.

　　我猜想她一個(gè)人過肯定很孤獨(dú)。