VOA慢速英语:3-D Printed Device Helps Children with Rare Breathing Disorder

1. You may have heard about a process called 3-D printing.

hear about 得悉，听说;因…受到报偿或惩罚;耳闻
例句：Never blindly believe anything you read or hear about.
不要盲目的相信所有你读到的和听到的。

2. The breathing passage can collapse, cutting off oxygen to the children.

cut off vt. 切除;切[隔]断;剪[切， 砍]下
例句：Fail to pay and they'll cut off the electricity.
你（如果）不付款，他们就要断电。

3. By printing this ahead of time, then we were able to practice the operation before we actually incised the child just to go in and save lives.

be able to 能够
例句：Mould you be able to describe a typical day on the job?
您能描述一下这个职位的日常工作内容吗？