I will use this glass slide to observe the cells.

He was observing the behavior of the birds.

He was observing the behavior of birds.

I will work using this laptop.

The doctor said that his vision loss was due to a problem with the vitreous body.

He is good at creating slides.

The children were playing by sliding on the slide in the park.

His ophthalmologist found an abnormality in the vitreous body.

He accidentally broke the glass.

I go jogging every day.