Materials quantity variance
[经] 材料数量差异
🧩 词语组成解析
materials
[[mə'tiəriəlz]]
n. 材料；材料费；材料科学；材质（material的复数）
variance
['vɛəriəns]
n. 变化，变动;不一致;分歧;<数>方差;
🗣️ 情景例句
Why should you be sorry?
你何必说对不起呢？
The mailbox is over there.
邮筒就在那儿。
In his youth, his father and grandfather often told him stories about their family history.
年轻时，他的父亲和祖父常常同他说起他们的家史。