backyard
/ˈbækˈjɑːd/noun
1- Brit. a yard at the back of a house or other building〈英〉后院。
1.1
- N. Amer. a back garden〈北美〉后花园。
1.2
- informal the area close to where one lives, or the territory close to a particular country, regarded with proprietorial concern〈非正式〉（国家的）附近地区; “后院”地区：
anything was preferable to a nuclear dump in their own backyard.
什么都比他们自己后院里的核废料堆要强。
1.3
- one's area of interest or operation（个人）兴趣所在; 业务范围。