This leaves fertile soil unprotected and prone to erosion.这会让肥沃的土壤暴露在外，使其容易受到侵蚀。You are playing Russian roulette every time you have unprotected sex.行房时不采取避孕措施是非常危险的。Machinery was often unprotected and accidents were fre...
The distribution of passports has been a slow process.颁发护照的过程非常缓慢。He muddled up our passports and gave me back the wrong one.他把我们的护照搞混了,把别人的发还给了我.Forged passports were found in a secret pocket in the hold - all .假护照是在手提箱...