en_tn/ecc/01/01.md

Like a vapor of mist, like a breeze in the wind

These two phrases mean the same thing and are combined for emphasis. (See: rc://en/ta/man/translate/figs-parallelism)

What profit does mankind gain...under the sun?

AT: "Mankind gains no profit...under the sun." (See: rc://en/ta/man/translate/figs-rquestion)