This was a prospective non-randomized community intervention trial designed to test the provision of injectable contraceptives by community-based reproductive health agents (CBRHAs).

这是一项前瞻性非随机性社区干预试验，旨在测试社区的生殖健康代理(CBRHAs)提供的避孕针剂。

youdao

The actual tests would employ the well-honed methods of operant conditioning, developed initially on pigeons, in which the test subject has first to work out what is going on by trial and error.

实际的测试会采用精确的操作性条件反射方法，测试对象首先要清楚实验的过程和错误。

youdao

And much like Steve Austin, the patient will be taken out on the test track and given a good trial run by many eager developers.

与Steve Austin非常相似，病人将出院进行测试跟踪，并由许多急切的开发人员给予良好的试用。

youdao

Sir Declan, sitting with Lord Justices Higgins and Girvan, held that the test applied by the trial judge required no knowledge of the attack until a rendezvous with the gunmen.

BBC: Northern Ireland

Prisoners searched using the scanners had to volunteer to be part of the process, so all of the illegal materials detected during the test were carried by prison officers who agreed to be part of the trial.

BBC: Scanners ruled out for NI prison searches after pilot

In fact, the genome resembles nothing so much as a hodgepodge of borrowed, copied, mutated, and discarded sequences and commands that has been cobbled together by millions of years of trial and error against the relentless test of survival.

FORBES: The Myth ... of the Myth of Junk DNA