They were randomly divided into four groups and exposed to various noise levels in the background, from total silence to 50 decibels, 70 decibels, and 85 decibels.
他们被随机分为四组，并被置于不同等级的背景噪音环境中，从完全寂静到有50分贝、70分贝和85分贝的噪音。
The patients were randomly divided into four groups.
患者术后随机分为四组。
In this test 128 Hailanhe layers aged 190 days were chosen and randomly divided into four groups.
本试验选用190日龄海兰褐蛋鸡(128只)，随机分为四组。
This experiment was without design, and subjects were randomly divided into four groups, each group randomly assigned to receive an objective result.
实验为组间设计，被试随机分为四组，每组随机接受一种客观结果。
Methods Forty rabbits were involved in this experiment. Animal model of right femur comminuted fracture was made and randomly divided into four groups.
方法制造兔右股骨粉碎性骨折的动物模型，a组用异体脱钙骨基质颗粒复合骨水泥并表面贴附自体骨渣进行修复；
Methods Forty rabbits were involved in this experiment. Animal model of right femur comminuted fracture was made and randomly divided into four groups.
方法制造兔右股骨粉碎性骨折的动物模型，a组用异体脱钙骨基质颗粒复合骨水泥并表面贴附自体骨渣进行修复；
应用推荐