# in the six hundred and first year

"when Noah was 601 years old" 

# the waters were dried up from off the earth

"the waters covering the earth dried up" or "the wind dried up the waters covering the earth"

# the covering of the ark

This refers to a cover that kept the rain water from going into the ark.

# behold

The word "behold" tells us to pay attention to the important information that comes next.