🧩 词语组成解析
v. 立基于, 以…为基础（base的过去式和过去分词）
🗣️ 情景例句
I estimate his age to be about 30.
我估计他的年龄大约30岁。
It won't take much time.
不会花很多霎时间的。
Compared with competing products, ours is smaller and lighter.
比起其它竞争产品，我们的比较轻巧。