此前: before this, before then, previously...
宁可: preferably, one would prefer to...(or not to...), would rather, (would) be better to, (to pick) the lesser of two evils...
结晶: to crystallize, crystallization, crystal, crystalline, the fruit (of labor etc)...
超市: supermarket, abbr. for...
优: excellent, superior...
空气: air, atmosphere...
例外: exception, to be an exception...
刮风: to be windy...
信箱: mailbox, post office box...
上下: up and down, top and bottom, old and new, length, about...
