Upper age limit for screening is not yet established.

乳腺癌筛查的年龄上限尚未确定。

youdao

So far there has not yet established a mature theory in entrepreneurship research.

创业领域至今还没有形成一个成熟的理论。

youdao

One chief reason for this is that the theoretical system of translation knowledge is not yet established or available.

其中的一个重要原因，是翻译教学尚未建立自己的理论知识体系。

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"What we see today is that viewer behaviors are not yet established in terms of viewing original programming online, " he says.

FORBES: AOL's Prime-Time Strategy

But other buy-out firms considering the same move, and that have not yet established its type of partnership, will not benefit from the grace period.

ECONOMIST: More transatlantic gripes

Analysts worry that the brand is not yet established enough to stretch easily across new categories, which include houseware and accessories such as perfume and shoes (where most luxury-goods groups make their money).

ECONOMIST: Face value