He had not been sure until now that the ex-manager was not an influential figure in the background.
在此之前，他一直拿不准这位前经理是不是在幕后施加影响的人物。His friends can never count upon how he is going to act under given conditions, as he is always full of surprises.
他的朋友从来拿不准他什么时候会怎么做，因为他总是做些出人意料的事。'I--I'm a little girl, ' said Alice, rather doubtfully, as she remembered the number of changes she had gone through that day.
“我是一个小姑娘。”爱丽丝拿不准地说，因为她想起了这一天中经历的那么多的变化。Similarly the principles on which your life is based may be entirely sound, but until you've examined them, you can't be certain of this.
与此相似，作为你的生活基础的那些原则，或许完全是说得过去的；但是，在你细究之前，你对此是拿不准的。These two person's appearance is called Jones to be also joyful worries, which one does she ponder over is also in doubt oneself to select.
这两个人的出现叫琼斯又欣喜又发愁，她思前想后也拿不准自己该挑哪一个。Carrie, coming in from another direction, thought she saw Mrs. Vance going away. She strained her eyes, but could not make sure.
嘉莉从另一个方向回来，好像看见万斯太太正在朝外走。她就瞪大两眼看着，但还是拿不准。eg. He doubted whether they would be able to help.
他拿不准他们是否能够帮忙。Fanny knew her own meaning, but was no judge of her own manner.
范妮很清楚自己的意思，但是对自己的举止却拿不准。He doubted whether they would be able to help.
他拿不准他们是否能帮上忙。