Sign mould
[计] 符号模型, 正负号模型
🧩 词语组成解析
mould
[məuld]
n. 铸模;模型;性格;霉;
vt. 用模子做;形成;陶冶，训练（人格）;用土覆盖;
🗣️ 情景例句
I can hardly keep my eyes open.
我简直睁不开眼睛了。
He that is full of himself is very empty.
自满的人是很空虚的。
We will take the Endeavour. It is a good, strong ship, though not very fast. There will be a lot of room below for stores.
我们用“奋力号”。它虽然速度不算快，但却是一只完好、结实的船。船体下面有很多地方还可以放储存品。