This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?

Zhong Nanshan, the famous medical scientist, has devoted most of his life useful ways in treating cough diseases.[ ]

When will the plane ___________?— In an hour.

It is reported that two schools, ___ ___ are being built in my hometown, will open next year.

Gothe park, and turn left onto Center Road.[ ]