She was a tall woman of indeterminate age.

她是个看不出年龄的高大女子。

《牛津词典》

Photo Tip: When your subject is of indeterminate size-a mountain, a body of water, a snowscape-add a sense of scale by including something of known size, such as a person, a car, a tree, or an animal.

拍照小技巧：当拍摄对象的大小不容易看出来的时候——例如拍摄一座山，一片水域，一处雪景——在画面中加入一样可以确知大小的对象，例如一个人，一辆车，一只动物等。

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One of the major limitations of CT screening is the number of screens in which a nodule or other indeterminate finding potentially related to lung cancer is found.

CT成像的一个主要局限性在于要做几次扫描才能发现一个结节或其它可能与肺癌相关的异常。

youdao

It's not just that Satan or the moon or whatever it is that we're looking at seems indeterminate until we get a proper look at it.

不仅是撒旦或月亮或者任意什么,我们在关注的，看起来非常不确定,直到我们得到了一个合理的想法。

耶鲁公开课 - 弥尔顿课程节选

Owen was given an indeterminate sentence with a minimum term of three years but he later challenged this and was given a six-year jail term instead.

BBC: Baby P case: Jason Owen returned to prison

At an earlier hearing, he was given an indeterminate sentence for a minimum of six years for the latest crime, to run concurrently with his life sentence.

BBC: Prisoner Edward Macdonald 'tried to burn down building'

It will be a indeterminate sentence.

BBC: Stuart Kuttner, Managing Editor, News of the World