Backscatter
[计] 反向散射
✅ 同义词
🗣️ 情景例句
My computer was infected by a virus, I guess since I didn't have firewall installed.
我的电脑受到病毒感染了，我想是因为我没装防火墙。
We've got to get a refrigerator for the kitchen.
我们必须有一个电冰箱放在厨房。
There was also a great deal of machinery on display.
参展的还有很多机器，