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1.A group of 一组；一群
Suddenly the door opened and a group of children burst in.
门突然打开，闯进了一群孩子。
2.back leg 后腿
Our cat has broken one of her back legs.
我们的猫折断了一条后腿。
3.stem cell 干细胞
Hematopoietic stem cell research is a new subject.
造血干细胞的研究是一门新兴的学科。
4.spinal cord 脊髓
Meningitis is an infection of the tissue that covers the brain and spinal cord.
脑膜炎是一种覆盖大脑和脊髓的组织被感染的疾病。
5.The research team also built a structure that provided an environment in which the stem cells could attach and grow into support cells.
grow into 变成；发育成
This political row threatens to grow into a full blown crisis.
这场政治争端有可能演化成一场全面爆发的危机。
Uncontrollable children grow into young criminals.
任性放肆的孩子会变成年轻的罪犯。
6.Only about 40 percent of the mice that received the stem cell transplants were able to support weight on their back legs and walk.
be able to 能够
By converting the loft, they were able to have two extra bedrooms.
把阁楼改造一下，他们就可以多出两间卧室。
We were able to stick to the main issue without incidental grievances being dragged in.
没有了附带扯进去的牢骚话，我们就能够紧扣主题。
