Backscratching
n. 为共同利益而互相利用
🗣️ 情景例句
You know I'm very excited about his arrival.
知道我对他的到来是多么兴奋。
Different articles require different forms of packing.
不同商品需要不同的包装。
You're not busy doing anything, are you?'
你不忙，是吗？”