Data on success rates are scarce, which is a problem.

成功的数据暂时不多，这是个问题。

youdao

Success rates are difficult to measure.

成功率是很难衡量的。

youdao

They turn to us because we can offer them treatment in clinics with no waiting lists and higher success rates.

他们求助我们，因为我们可以为他们提供治疗诊所，没有轮候名单和较高的成功率。

youdao

other medical centers did only one. Success rates varied a lot, but according to their statistical analysis, only about one-eighth of the success depended on how many transplants the hospital did a year.

VOA: standard.2010.07.14

The UK was close to the top of the league on one measure of success rates - although the exact figures provoked controversy over their accuracy and were withheld from the conference.

BBC: UK fertility services lag behind Europe

Beware if a firm does not release school-by-school success rates, refuses to provide references, or has been in business less than 5 years.

FORBES: 6 Steps to Take Now for a Successful MBA Application

It is the long-held research strategy at Novartis, and is very much what Elias Zerhouni, the head of research at Sanofi, has in mind when he talks about his plan to improve long-term success rates.

FORBES: How A Failed Alzheimer's Drug Illustrates The Drug Industry's Gambling Problem