復(fù)數(shù)形式：backs
例句：
You'll make your back ache if you carry those heavy buckets.
如果你背那些沉重的桶，你的背會痛的。
更多信息：
Three people can sit in the back of this car.
Back and forth 來回地：The guard walked back and forth in front of the gate.
back away 逐漸后退
back to back 連續(xù)的
at somebody's back 幕后支持
用戶評論
貪吃的嘉嘉
哦心