The comparative trials were carried out in two henhouses with same poultry density, same ventilation and temperature controlling system.

选取尺寸、样式和饲养密度等完全相同的两栋蛋鸡舍作对比试验，两栋鸡舍通风采用自动控制装置。

youdao

The characteristics of droplet drift and deposit were tested in the comparative trials with representative nozzles at different wind speeds, temperatures, relative humidity etc.

在风洞中试验对比研究了典型喷头在不同环境（风速、 温度、相对湿度等）条件下的雾滴飘移沉积特性。

youdao

Comparative efficacy and safety of OADs in management of GDM: network meta-analysis of randomized controlled trials.

在妊娠期糖尿病的管理的有效性和安全性比较的口服降糖药：网络荟萃分析的随机对照试验。

youdao

However, as pointed out by Dr. Ben Goldacre (Bad Pharma, p 225), no head-to-head comparative trials of statins have ever been done.

FORBES: Do We Really Need Head-To-Head Comparison Trials With Statins To Improve Cardiac Health?

Even though the NIH could be a big help, having it take over comparative trials of medicines could be a huge burden.

FORBES: FDA Fix No. 4: Government-Funded Studies

Comparative effectiveness research involves running large, statistically robust clinical trials so we can judge how different therapies for a particular disease compare to each other.

FORBES: How Comparative Effectiveness Research Gets Corrupted by Politics