He knew it was impossible to accomplish it by individual effort only〔alone〕.

他知道只靠个人努力是不能完成那件工作的。

youdao

Only six years earlier Charles Lindburgh became famous around the world as the first person to fly alone across the Atlantic Ocean.

VOA: special.2009.03.18

So the only way I can get an unpaired is to put it alone in another orbital.

所以获得不成对电子的唯一方法是,把它放在另一个轨道上。

麻省理工公开课 - 固态化学导论课程节选

It was nineteen thirty-three. Only six years earlier Charles Lindburgh became famous around the world as the first person to fly alone across the Atlantic Ocean.

VOA: special.2011.04.27

What the actors do nail is the emotional chemistry of a high-profile couple who, for the longest time, could really only be alone together when they were on stage.

NPR: 'Walk the Line' Walks a Straight Line

We want a world with more global cooperation where we act alone only when we absolutely have to.

CNN: Clinton: Time again to choose a more perfect union

Off-domain social networks are an important part of an overall social strategy, but presence alone only gets us part way there.

FORBES: Why Facebook Can't Be The Center Of Your Social Strategy