Pond scum
n. （浮在死水上面的）绿藻类层
🧩 词语组成解析
pond
[pɑnd]
n. 池塘;
v. 筑成池塘;
scum
[skʌm]
n. 浮渣;泡沫;糟粕;
vi. 产生泡沫;被浮渣覆盖;
vt. 将浮渣去除掉;
🗣️ 情景例句
Charley Rafer.
Charley Rafer。
How ofter did I tell you to sit straight?
我告诉你多少次要坐正?
It was simply a blank sheet of paper.
而是一张白纸。