Backstopping
支援（backstop的现在分词）
🗣️ 情景例句
I was deeply impressed by his speech.
他的演讲给我留下深刻的印象。
Please give me your frank opinion.
请给我你坦率的意见。
At the station, he was told by a smiling policeman that his bicycle had been found.
在警察局里，一位面带笑容的警察告诉他，他的自行车找到了。