Because I am lonely only when you cannot see me.

因为我只有在你看不见我的时候，我才最寂寞。

youdao

I'm lonely only when I am overtired, when I have worked too long without a break, when for the time being I feel empty and need filling up.

只有在过度劳累时，我才会感到孤独，心也像被掏空了一般。

youdao

I'm lonely only when I am overtired, when I have worked too long without a break, when from the time being I feel empty and need filling up.

只有在我过度劳累的时候，在我长时间不断工作的时侯，在我感到内心空虚，需要充实的时候，我才会感到寂寞。

youdao

It is night time. And the only sound that can be heard is the long, lonely whistle coming from the train's engine.

VOA: special.2010.06.13

Lonely hearts, were not only left without that much fantasized love connection, they had less money in their pockets too.

FORBES: Where Americans Lost Money Online

Dr Cole suspects this could help explain not only why the lonely are iller, but how, in evolutionary terms, this odd state of affairs has come about.

ECONOMIST: The reason loneliness could be bad for your health

Saudi Arabia, by contrast, is stranded on one of those lonely clumps of products that seem only distantly related to anything else.

ECONOMIST: Economics focus: Diversity training | The