有些有袋目动物可以同时在育儿袋中抚育三个刚出生的婴儿。
Some marsupials can care for three newborns in their pouch at the same time.
在三个研究中心带领下的实验中，开始喂药的相对年老的老鼠大体上比啮齿目动物活得长。
In tests conducted at three research centres, mice that began taking the drug at a relatively old age lived substantially longer than other rodents.
该RC2项目分为三个部分：一是技术研发，二是系统工程一体化，三是测试评估和展示（EED）。
The RC2 program is divided into three areas: Area 1 is the Technology Development, Area 2 is System Engineering and Integration and Area 3 is Experimentation, Evaluation and Demonstration (EED).
应用推荐