The following rule is a useful test for intervisibility . 下面介绍一种检验通视的方法。
A useful test for diagnosis of infectious diarrheas is stool examination for ova and parasites 感染性腹泻诊断的检查是大便检查寻找卵和寄生虫。
Study on the quick and useful testing methods for shieldability of polymer packaging materials 一种快速有效的高分子包装材料阻隔性测试方法的研究
The pig serves as a useful test of the personality traits of the drawer . 1 , 419 , 490 pigs in the gallery ! 这个服务是用来测试绘画者的性格特点.这里已经1419490头猪!
Useful tests may include full blood count and erythrocyte sedimentation rate , as well as testing for endomysial antibodies 有效的检查包括全血细胞计数、红血球沉降速率和人肌内膜抗体检测。