An unprotected person or place is not looked after or defended, and so they may be harmed or attacked.
例句
The landing beaches would be unprotected.登陸的海灘可能沒有設防。
ADJ
暴露在外的；易受損的
If something is unprotected, it is not covered or treated with anything, and so it may easily be damaged.
例句
Exposure of unprotected skin to the sun carries the risk of developing skin cancer...皮膚沒有采取任何防曬措施就在太陽下曝曬的話有得皮膚癌的危險。This leaves fertile soil unprotected and prone to erosion.這會讓肥沃的土壤暴露在外，使其容易受到侵蝕。
ADJ
未用避孕套的；無防護的
If two people have unprotected sex, they do not use a condom when they have sex.
英英詞典釋義
Adjective
1. lacking protection or defense
2. lacking protection or a guard;
"an unguarded gate""his unguarded queen was open to attack"