But much of this advice is broad and non-specific, leaving development teams to learn by trial and error.
但是大多数这种建议都太宽泛而且不具体，使得开发团队必须自己从尝试和错误中学习。
2
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。
3
Nowak's comment is a surprising admission in an industry that otherwise prefers to call the idea of pre-loading trial apps and other non-essential software as a deal designed to help the consumer.