back onto something
phrasal verb with back verb uk/bæk/ us/bæk/
（建筑物）背靠着…，后面是…
If a building backs onto something, its back faces that thing.
The house backs onto a narrow alley. 房子后面是一条狭窄的胡同。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。