Back-filling
[化] 回填充
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
filling
['filiŋ]
n. 装满，填满;填充物;（糕点内的）馅;（织品的）纬纱;
v. 填满(fill的ing形式);
🗣️ 情景例句
I happened to over hear what he said.
我碰巧听到了他所说的话。
I don't know where I've seen him before.
我不晓得在哪儿见过他。
But I think it's much nicer in a paper bag,in the open air!
不过我想把它放在纸袋里，在露天吃更好！