patch test

基本解释

When using a hair colour for the first time, do conduct a 24 hour patch test.
第一次染发时，做一个24小时的皮肤过敏试验。
There is also a patch test in which an ethanol-soaked pad is applied to the skin.
还有另外一种测试方法，就是在皮肤上帖一个用酒精浸湿后的贴布。
Dr. Brooks said that the two questions give doctors an easy way to find out if the patient is ALDH2-deficient. There is also a patch test in which an ethanol-soaked pad is applied to the skin.
布克博士说这两个问题给了医生一种简单的方法去发现患者是不是ALDH2先天缺乏者.还有一种斑片试验也可以测试患者是否有高几率的ALDH2先天缺乏通过把被酒精浸湿的布片放在患者皮肤上如果在10到15分钟后患者皮肤变红那么他很有可能就是高几率的ALDH2先天缺乏者.

And Google has been slow to patch those vulnerabilities in Android, Oberheide says, often pushing out fixes to just a segment of users as a test before fully patching phones weeks later.
FORBES: Updated with Google response below.

a test to detect an allergic reaction by applying small amounts of a suspected substance to the skin and then examining the area for signs of irritation