en_tn/num/01/50.md

the tabernacle of the covenant decrees

The tabernacle was also called by this longer name because the ark with the law of God was placed inside it.

everything in it

Here "it" refers to the tabernacle.

The Levites must carry the tabernacle

It was their job to carry the tabernacle when they traveled. Alternate translation: "When you travel, the Levites must carry the tabernacle" (See: rc://en/ta/man/jit/figs-explicit)

make their camp around it

This means that they were to set up their tents around the tabernacle. Alternate translation: "set up their tents around it" (See: rc://en/ta/man/jit/figs-idiom)