透气: to flow freely (of air), to ventilate, to breathe (of fabric etc), to take a breath of fresh air, to divulge...
你们: you (plural)...
对比: to contrast, contrast, ratio...
热气球: hot air balloon...
西: west...
长短: length, duration, accident, right and wrong, good and bad, long and short...
细心: careful, attentive...
少见: rare, not familiar (to the speaker), sth rarely experience, hard to see...
目的: purpose, aim, goal, target, objective...
环绕: to surround, to circle, to revolve around...