/bæk/
VT 后退；
- The way back home.
VT 支持；
- If a singer is backed by a band or by other singers, they provide the musical background for the singer;
- A model backed by a
Vec<T>. - I’ll back you up.我支持你！
VI 后退；
- Experts had tried to guide the four-metre orca ~ to the sea after it swam up the River Seine.
N 背部；
- A person’s or animal’s ~ is the part of their body between their head and their legs that is on the opposite side to their chest and stomach;
- Don’t worry, man. I got your back. 这句原本来自“I’m covering you from behind”（我在后面掩护你），是打仗时军人常说的一句话。但在现代的意思是我会照料一切，要对方不必担心，所以这句男人会常用，女人反而较少用。
- When the world turns its ~ on you, you turn your ~ on the world.如果这个世界对你不理不睬，你也可以这样对待它。
ADV
-
You can’t take it back!说话算话！
-
come back.