In a double-blind trial, there were some improvements.

在一个双盲测试中，有了一些进步。

《柯林斯英汉双解大词典》

Methods Multi-center randomized double-blind trial with positive control and split-mouth comparison was designed.

方法多中心随机、双盲、阳性药物对照、左右半口对照设计。

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Methods We conducted a multicenter, randomized, double-blind trial involving nulliparous women who were at low risk for preeclampsia.

方法我们进行了一项多中心、随机、双盲试验，纳入先兆子痫危险低的未经产妇女。

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It is because the government-funded trial was a placebo-controlled, double-blind, randomized controlled trial.

FORBES

In the double-blind, randomized control trial, half the women got tenofovir gel and half got a placebo.

CNN: Gel cuts HIV transmission rate in study

And in a study published last year, researchers in Australia showed in a double-blind, placebo-controlled trial that subjects with suspected gluten sensitivity had substantially fewer symptoms on a gluten-free diet than control subjects who unknowingly ingested gluten.

WSJ: New Guide to Who Really Shouldn't Eat Gluten